Abstract:
A firearm barrel accessory that quick connects and disconnects to a firearm barrel by rotating is described. The accessory may be a firearm suppressor with a silencer barrel, a mount retention ring located inside the silencer barrel that includes longitudinal grooves that lead to circumferential grooves that have a first radial side and a second radial side. The firearm barrel is attached to a muzzle break that may include a plurality of lugs that fit into longitudinal grooves. After placement in the longitudinal grooves, the silencer barrel and mount retention ring are rotated/twisted about the silencer barrel longitudinal axis so that the circumferential grooves move relative to the lugs until the lugs contact the second radial side, at which point the mount retention ring ceases to rotate while the silencer barrel continues to rotate. A ratchet retention ring may exert tension on the mount retention ring in the rearward direction.

Description:
BACKGROUND 
     Technical Field 
     The present invention relates to firearm barrel accessories such as suppressors, also known as silencers. 
     Background of the Invention 
     Firearm suppressors, commonly referred to as gun silencers are known in the art. In some prior art devices firearm silencers may be threaded to the gun barrel. 
     U.S. Pat. No. 5,433,133 (the &#39;133 patent) teaches a gun barrel coupling member for attaching and detaching a firearm accessory, namely a flash hider, to the front end of the gun barrel of the firearm. The &#39;133 patent teaches a gun barrel with radially spaced lugs that fit inside notches in a coupling member. The coupling member is, in turn, attach to the flash hider via threads. A pin is inserted in the coupling member to limit rotation of the coupling member on the end of the gun barrel. Operation of the pin is not described in the &#39;133 patent. Without being bound to any particular theory, it is believed that the flash hider may be prone to detaching from the coupling member over time due to vibration. 
     BRIEF SUMMARY 
     The present disclosure provides a firearm barrel accessory system as described herein. Optionally, the firearm barrel accessory system is in the form a firearm suppressor system comprising: 
     a) a firearm comprising a gun barrel configured to fire ammunition; 
     b) a muzzle break attached to the gun barrel and comprising a muzzle break interior receiving the gun barrel, a muzzle break rear end facing the firearm and comprising a muzzle break rear opening leading to the muzzle break interior, a muzzle break forward end comprising a muzzle break forward opening leading to the muzzle break interior and configured to eject the ammunition, a muzzle break length extending from the muzzle break forward end to the muzzle break rear end, a muzzle break width perpendicular to the muzzle break length, a muzzle break circumference perpendicular to the muzzle break length, and a plurality of lugs spaced about the muzzle break circumference; 
     c) a mount retention ring configured to receive the muzzle break and comprising an interior wall forming a mount retention ring interior, a mount retention ring exterior, a mount retention ring forward end comprising a mount retention ring forward opening leading to the mount retention ring interior, a mount retention ring rear end comprising a mount retention ring rear opening leading to the mount retention ring interior, a mount retention ring length extending from the mount retention ring forward end to the mount retention ring rear end, a mount retention ring circumference perpendicular to the mount retention ring length, a plurality of longitudinal grooves located in the interior wall, each longitudinal groove having a longitudinal groove forward end, a longitudinal groove rear end, a longitudinal groove length extending from the longitudinal groove forward end to the longitudinal groove rear end, the longitudinal groove length extending partially about the mount retention ring length, each of the longitudinal grooves configured to allow a lug of the plurality of lugs to pass therethrough, a plurality of circumferential grooves, each of the plurality of circumferential grooves located in the interior wall at the forward end of a longitudinal groove and extending partially about the mount retention ring circumference, each of the plurality of circumferential grooves configured to receive a lug from a longitudinal groove and having a circumferential groove rear side defined by a rear ledge located in the interior wall, a circumferential groove forward side defined by a forward ledge in the interior wall, the forward ledge located forwardly relative to the rear ledge in the mount retention ring interior, a circumferential groove thickness extending from the circumferential groove forward side to the circumferential groove rear side, a circumferential groove first radial side located adjacent to a longitudinal groove, a circumferential groove second radial side opposite the first radial side, a circumferential groove length extending from the first radial side to the second radial side and generally parallel to the mount retention ring circumference and generally perpendicular to the longitudinal groove lengths, a plurality of indentations, each indentation located in a rear ledge adjacent to a second radial side of a circumferential groove and extending toward the mount retention ring rear end, and a plurality of mount retention ring threads spaced about the exterior of the mount retention ring; and 
     d) a silencer barrel comprising a silencer barrel interior comprising the mount retention ring, a silencer barrel exterior wall, a silencer barrel front end comprising a silencer barrel forward opening leading to the silencer barrel interior and configured to fire the ammunition, a silencer barrel rear end comprising a silencer barrel rear opening leading to the silencer barrel interior, a silencer barrel length extending from the silencer barrel front end to the silencer barrel rear end, and a plurality of silencer barrel threads located in the silencer barrel interior and mating with the mount retention ring threads, 
     wherein, when the ammunition is fired from the firearm, the ammunition is configured to pass from the gun barrel, through the muzzle break interior, through the mount retention ring interior, and out the silencer barrel forward opening, and the silencer barrel interior is configured to dampen noise emanating from the firearm suppressor system,
 
wherein the silencer barrel comprises a longitudinal axis parallel to the silencer barrel length and passing through the silencer barrel interior,
 
wherein rotating the silencer barrel exterior wall a first rotation about the longitudinal axis relative to the muzzle break and the gun barrel when each lug is located in a circumferential groove and adjacent to the first radial side and adjacent to a rear ledge is configured to rotate the mount retention ring so that each second radial side moves toward and contacts a lug, and further wherein rotating the silencer barrel exterior wall a second rotation in the same direction as the first rotation about the longitudinal axis relative to the muzzle break and the gun barrel when each lug is located in a circumferential groove and contacting the second radial side is configured to move the mount retention ring threads about the silencer barrel threads and to move the mount retention ring longitudinally within the silencer barrel interior toward the silencer barrel front end so that each indentation approaches one of the lugs.
 
     Optionally, the mount retention ring threads are not configured to move about the silencer barrel threads during the first rotation and the mount retention ring is configured to remain a fixed distance from the silencer barrel front end during the first rotation. Optionally, the spacing between the lugs along the muzzle break circumference is substantially equal to the spacing between the longitudinal grooves about the mount retention ring circumference. Optionally, the system further comprises at least one retention spring exerting tension on the mount retention ring in the rear direction. Optionally, the at least one retention spring comprises a forward end connected to a ledge within the silencer barrel interior and a rear end connected to a forward end of a pin, and further wherein the pin further comprises a rear end connected to the mount retention ring forward end. Optionally, the forward end of the pin is attached to a forward end of a ratchet retention ring, and further wherein the ratchet retention ring comprises a rear end comprises a plurality of teeth spaced about a circumference of the ratchet retention ring and configured to mate with a plurality of forward end grooves spaced about the circumference of the mount retention ring forward end, each of the plurality of forward end grooves separated by a ridge. Optionally, the silencer barrel interior comprises a plurality of baffles forwardly disposed relative to the silencer barrel threads. Optionally, the muzzle break comprises a tapered portion located forwardly relative to the lugs and configured to contact a tapered portion of an interior wall of the silencer barrel when the plurality of lugs are located in the plurality of circumferential grooves and further wherein the contact between the tapered portion of the muzzle break and the tapered portion of the interior wall is configured to prevent the muzzle break from moving toward the silencer barrel front end. Optionally, the forward ledges are configured to prevent the plurality of lugs from moving forwardly within the silencer barrel interior beyond the forward ledges. Optionally, the silencer barrel is configured to be locked to the muzzle break with a user using one hand to rotate the silencer barrel exterior wall. Optionally, all components for attaching the muzzle break to the silencer barrel are located in the silencer barrel interior when the silencer barrel is locked to the muzzle break. Optionally, the silencer barrel further comprises a tube locking ring comprising tube locking ring threads mating with the silencer barrel threads, the tube locking ring forming the rear end of the silencer barrel and configured to prevent the mount retention ring threads from moving rearwardly beyond the silencer barrel threads, a taper mount cap comprising the silencer barrel threads, and a sleeve forming the forward end of the silencer barrel. Optionally, the muzzle break further comprises plurality of gas ports configured to reduce flash and further wherein the lugs are located rearwardly relative to the gas ports. Optionally, each lug comprises a lug width generally perpendicular to the muzzle break circumference, wherein each of the longitudinal grooves comprises a longitudinal groove width generally parallel to the mount retention ring circumference, each indentation comprises an indentation width generally parallel to the mount retention ring circumference, wherein the width of each respective lug is approximately equal in size to the width of the longitudinal groove that the lug passes through, and further wherein the width of each respective lug is less than the width of the circumferential groove that the lug passes through. Optionally, the lugs are generally pyramidal in shape. Optionally, the lugs each have a lug length generally parallel to the muzzle break length, wherein the indentations each have an indentation length generally parallel to the mount retention ring length, and further wherein the length of each respective lug is greater than the length of the indentation that the lug is moved into. Optionally, the circumferential grooves are generally perpendicular to the longitudinal grooves. Optionally, each of the plurality of lugs have the same shape. 
     The present disclosure also provides a method of mating a suppressor to a firearm, the method comprising the steps of: a) providing the system; b) inserting the lugs through the longitudinal grooves and into the circumferential grooves adjacent to the circumferential groove first radial ends; c) rotating the silencer barrel exterior wall the first rotation relative to the muzzle break so that the lugs move towards and contact the circumferential groove second radial ends; and d) rotating the silencer barrel exterior wall the second rotation relative to the muzzle break so that the lugs cause the mount retention ring threads to move along the silencer barrel threads and cause the mount retention ring to move forwardly within the barrel sleeve interior so that the indentations move forwardly within the silencer barrel interior toward the lugs. 
     In still further embodiments, the present disclosure provides a firearm suppressor system comprising: 
     a) a firearm comprising a gun barrel configured to fire ammunition; 
     b) a muzzle break attached to the gun barrel and comprising a muzzle break interior receiving the gun barrel, a muzzle break rear end facing the firearm and comprising a muzzle break rear opening leading to the muzzle break interior, a muzzle break forward end comprising a muzzle break forward opening leading to the muzzle break interior and configured to eject the ammunition, a muzzle break length extending from the muzzle break forward end to the muzzle break rear end, a muzzle break width perpendicular to the muzzle break length, and a muzzle break circumference perpendicular to the muzzle break length; and 
     c) a silencer barrel configured to removably lock to the muzzle break and comprising a silencer barrel interior comprising the mount retention ring, a silencer barrel front end comprising a silencer barrel forward opening leading to the silencer barrel interior and configured to fire the ammunition, a silencer barrel rear end comprising a silencer barrel rear opening leading to the silencer barrel interior, a silencer barrel length extending from the silencer barrel front end to the silencer barrel rear end, and a longitudinal axis parallel to the silencer barrel length and passing through the silencer barrel interior, the silencer barrel comprised of:
         i) a tube locking ring forming the rear end of the silencer barrel and having a tube locking ring rear end comprising the silencer barrel rear opening and a tube locking ring forward end comprising a plurality of tube locking ring threads;   ii) a mount retention ring comprising a circumference and at least one lock configured to removably lock to the muzzle break, the mount retention ring comprising a forward end comprising a plurality of mount retention ring threads disposed forwardly within the silencer barrel interior relative to the tube locking ring threads and a plurality of grooves spaced about the circumference of the forward end of the mount retention ring;   iii) a ratchet retention ring comprising a forward end facing the forward end of the silencer barrel and a rear end facing the plurality of grooves and comprising a plurality of teeth configured to mate with the plurality of grooves;   iv) a taper mount cap disposed forwardly relative to the tube locking ring, the taper mount cap comprising an interior comprising the mount retention ring, the ratchet retention ring, a taper mount cap ledge disposed forwardly relative to the mount retention ring and the ratchet retention ring within the taper mount cap interior and a plurality of taper mount cap threads configured to mate with the tube locking ring threads and the mount retention ring threads, the taper mount cap ledge comprising a taper mount cap ledge circumference and a plurality of spring recesses spaced about the taper mount cap ledge circumference;   v) a plurality of retention springs seated inside the plurality of spring recesses, each spring having a forward end and a rear end; and   vi) a plurality of retention pins located inside the taper mount cap interior, each retention pin having a forward end attached to a rear end of a retention spring and a rear end attached to the ratchet retention ring,
 
wherein the taper mount cap, the ratchet retention ring and the tube locking ring are rotatable along a silencer barrel longitudinal axis relative to the mount retention ring, wherein rotation of the taper mount cap, the ratchet retention ring and the tube locking ring relative to the mount retention ring causes the mount retention ring to move along the taper mount cap threads and the silencer barrel length and causes the teeth to move about the mount retention ring grooves, wherein the retention pins exert tension on the ratchet retention ring in the rear direction,
 
wherein, when the ammunition is fired from the firearm, the ammunition is configured to pass from the gun barrel, through the muzzle break interior, through the tube locking ring, through the taper mount cap interior and out the silencer barrel forward opening, and the silencer barrel interior is configured to dampen noise emanating from the firearm suppressor system.
       

     Optionally, the mount retention ring lock comprises at least one mount retention ring groove located in the mount retention ring interior and configured to mate with a muzzle lug located on the muzzle. 
     The firearm suppressor system may include any of the embodiments of the prior embodiment. For example, optionally the at least one groove comprises at least one longitudinal groove extending partially about the mount retention groove length and at least one circumferential groove connected to the at least one longitudinal groove and extending partially about the mount retention groove circumference. Optionally, the silencer barrel interior comprises a plurality of baffles disposed forwardly relative to the taper mount cap. Optionally, rotation of the taper mount cap, the ratchet retention ring and the tube locking ring relative to the mount retention ring causes the mount retention ring to move along the taper mount cap threads and to move forwardly the silencer barrel length. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  illustrates an assembled, side elevation view of a firearm suppressor system of one embodiment of the present invention. 
         FIG. 1A  illustrates a partially exploded, side perspective view of the firearm suppressor system of  FIG. 1  without the firearm; in  FIG. 1A , the muzzle break is about to be inserted into mount retention ring interior. 
         FIG. 1B  illustrates an assembled, side perspective view of the firearm suppressor system of  FIG. 1A ; in  FIG. 1B  the muzzle break is inserted into the mount retention ring interior. 
         FIG. 1C  illustrates an assembled, side perspective view of the firearm suppressor system of  FIG. 1B ; as compared to  FIG. 1B , in  FIG. 1C  the silencer barrel exterior wall and the mount retention ring have been rotated 60 degrees counter-clockwise (into the page) relative to the muzzle break. 
         FIG. 1D  illustrates an assembled, side perspective view of the firearm suppressor system of  FIG. 1C ; as compared to  FIG. 1C , in  FIG. 1D  the silencer barrel exterior wall has been rotated 30 degrees counter-clockwise (into the page) relative to the muzzle break and the mount retention ring and the mount retention ring has moved forwardly within the silencer barrel interior relative to  FIG. 1C . 
         FIG. 1E  illustrates an assembled, side perspective view of the firearm suppressor system of  FIG. 1D ; as compared to  FIG. 1D , in  FIG. 1E  the silencer barrel exterior wall has been rotated 30 degrees counter-clockwise (into the page) relative to the muzzle break and the mount retention ring, and the mount retention ring has moved forwardly within the silencer barrel interior relative to  FIG. 1D . 
         FIG. 2  illustrates a side exploded perspective view of the firearm suppressor system of  FIGS. 1A-1E . 
         FIG. 3  illustrates another side exploded perspective view of the firearm suppressor system of  FIG. 1A-1E . 
         FIG. 4A  illustrates a partially exploded, side perspective view of the firearm suppressor system of  FIGS. 1A-1E ; in  FIG. 4A , the muzzle break is about to be inserted into mount retention ring interior. 
         FIG. 4B  illustrates a partially exploded, rear perspective view of the firearm suppressor system of  FIGS. 1A-1E ; in  FIG. 4B , the muzzle break is about to be inserted into mount retention ring interior. 
         FIG. 4C  illustrates a partially exploded, rear perspective view of the firearm suppressor system of  FIGS. 1A-1E ; in  FIG. 4C , the muzzle break is about to be inserted into mount retention ring interior and the tapered mating surfaces on the muzzle break and the silencer barrel interior wall (more particularly in the taper mount cap) are apparent. 
         FIG. 4D  illustrates a partially exploded, side perspective view of the firearm suppressor system of  FIGS. 1A-1E ; in  FIG. 4D , the muzzle break is about to be inserted into mount retention ring interior, and the arrows show how the lugs are moved through the longitudinal grooves and into the circumferential grooves, then along the circumferential grooves and then towards the indentations. 
         FIG. 5A  illustrates a rear, perspective view of the mount retention ring of the firearm suppressor system of  FIGS. 1A-1E . 
         FIG. 5B  illustrates a front, perspective view of the mount retention ring of  FIG. 5A . 
         FIG. 5C  illustrates a front, elevation view of the mount retention ring of  FIG. 5A . 
         FIG. 5D  illustrates a cross-sectional view of the mount retention ring of  FIG. 5C , taken along line  5 D- 5 D of  FIG. 5C . 
         FIG. 5E  illustrates a cross-sectional view of the mount retention ring of  FIG. 5D , taken along line  5 E- 5 E of  FIG. 5D . 
         FIG. 5F  illustrates a cross-sectional view of the mount retention ring of  FIG. 5D , taken along line  5 F- 5 F of  FIG. 5D . 
         FIG. 6A  illustrates a rear elevation view of the taper mount cap of the firearm suppressor system of  FIGS. 1A-1E . 
         FIG. 6B  illustrates a cross-sectional view of the taper mount cap of  FIG. 6A , taken along line  6 B- 6 B of  FIG. 6A . 
         FIG. 6C  illustrates a rear perspective view of the taper mount cap of  FIG. 6A . 
         FIG. 7A  illustrates a rear, perspective view of the ratchet retention ring of the firearm suppressor system of  FIGS. 1A-1E . 
         FIG. 7B  illustrates another rear perspective of the ratchet retention ring of  FIG. 7A . 
         FIG. 7C  illustrates a front elevation view of the ratchet retention ring of  FIG. 7A . 
         FIG. 7D  illustrates a side elevation view of the ratchet retention ring of  FIG. 7A . 
         FIG. 7E  illustrates a rear elevation view of the ratchet retention ring of  FIG. 7A . 
         FIG. 7F  illustrates a front perspective view of the ratchet retention ring of  FIG. 7A . 
         FIG. 8A  illustrates a rear elevation view of the firearm suppressor system of  FIGS. 1A-1E ; in  FIG. 8A , the muzzle break has been inserted into the mount retention ring, the lugs have travelled through the longitudinal grooves, and the taper of the muzzle break has contacted the taper of the interior wall of the silencer barrel. 
         FIG. 8B  illustrates a cross-sectional view of the firearm suppressor system of  FIG. 8A , taken along line  8 B- 8 B of  FIG. 8A . 
         FIG. 9A  illustrates a rear elevation view of the firearm suppressor system of  FIG. 8A ; in  FIG. 9A , as compared to  FIG. 8A , the silencer barrel exterior wall and the mount retention ring have been rotated 60 degrees counter-clockwise relative to the muzzle break. 
         FIG. 9B  illustrates a cross-sectional view of the firearm suppressor system of  FIG. 9A , taken along line  9 B- 9 B of  FIG. 9A . 
         FIG. 9C  illustrates a closeup cross sectional view of the muzzle break and mount retention ring of  FIG. 9B ; as shown in  FIG. 9C , the lug is not in contact with the indentation. 
         FIG. 10A  illustrates a rear elevation view of the firearm suppressor system of  FIG. 8A ; in  FIG. 10A , as compared to  FIG. 9A , the silencer barrel exterior wall has been rotated 60 degrees counter-clockwise relative to the muzzle break and the mount retention ring, and the mount retention ring has moved forwardly within the silencer barrel interior relative to  FIG. 9A  so that the lug contacts the indentation. 
         FIG. 10B  illustrates a cross-sectional view of the muzzle break and the mount retention ring of  FIG. 10A , taken along line  10 B- 10 B of  FIG. 10A ; it being understood that  FIG. 10B  is a closeup view similar to  FIG. 9C . 
         FIG. 11A  illustrates a rear elevation view of the firearm arm suppressor system of  FIG. 8A , in  FIG. 11A  the silencer barrel and the mount retention ring have been rotated 36 degrees counter-clockwise relative to the muzzle break and the muzzle break is partially cut away to better show the lug, retention springs and the ratchet retention ring. 
         FIG. 11B  illustrates a cross-sectional view of the firearm suppressor system of  FIG. 11A , taken along line  11 B- 11 B of  FIG. 11A . 
         FIG. 11C  illustrates a closeup cross sectional view of the muzzle break and mount retention ring, ratchet retention ring and retention springs of  FIG. 11B ; as shown in  FIG. 11C , the indentation has partially moved towards the lug and the and the mount retention ring has moved forwardly within the silencer barrel interior relative to  FIG. 8A  and the teeth of the ratchet retention ring are located on the ridges adjacent to the rear grooves of the mount retention ring. 
     
    
    
     DETAILED DESCRIPTION 
     With reference to  FIGS. 1-11  the present disclosure provides a firearm barrel accessory system designated by the numeral  10 . In the drawings, not all reference numbers are included in each drawing for the sake of clarity. In addition, although the firearm barrel accessory system  10  is preferably a firearm suppressor —otherwise known as a silencer—other firearm barrel accessories may use the attachment described herein. 
     Referring further to  FIGS. 1-11 , the firearm barrel accessory system  10  includes a firearm  9  comprising a gun barrel  12  configured to fire ammunition. In addition to the gun barrel  12 , the firearm  9  includes one or more components typically found in a firearm  9  including those now known or later developed such as a trigger, an ammunition magazine, and a scope. 
     The firearm barrel accessory system  10  further includes a muzzle break  14  attached (preferably removably attached) to the gun barrel  12  and comprising a muzzle break interior  16  receiving the gun barrel  12 , a muzzle break rear end  18  facing the firearm  9  and comprising a muzzle break rear opening  20  leading to the muzzle break interior  16 , a muzzle break forward end  22  comprising a muzzle break forward opening  24  leading to the muzzle break interior  16  and configured to eject the ammunition, a muzzle break length  26  extending from the muzzle break forward end  22  to the muzzle break rear end  18 , a muzzle break width  28  perpendicular to the muzzle break length  26 , and a muzzle break circumference  30  perpendicular to the muzzle break length  26 . The muzzle break  14  preferably includes a plurality of lugs  32  that are preferably unevenly spaced about the muzzle break circumference  30  (it being understood that evenly spaced would mean that one lug would be at 0 degrees, a second lug would be at 120 degrees, and a third lug would be at 240 degrees if the muzzle break included three lugs). 
     The firearm barrel accessory system  10  further includes a mount retention ring  34 . In some embodiments, the mount retention ring  34  comprises a mount retention ring interior wall  154  forming a mount retention ring interior  36 , which receives the muzzle break  14 . The mount retention ring  34  further includes a mount retention ring exterior  38 , a mount retention ring forward end  40  comprising a mount retention ring forward opening  42  leading to the mount retention ring interior  36 , a mount retention ring rear end  44  comprising a mount retention ring rear opening  46  leading to the mount retention ring interior  36 , a mount retention ring length  48  extending from the mount retention ring forward end  40  to the mount retention ring rear end  44 , a mount retention ring circumference  50  perpendicular to the mount retention ring length  48 , and a lock to removably attach to the muzzle break  14 . In some embodiments, the lock is comprised of one or more grooves in the interior wall  154  (more particularly, two or more longitudinal grooves  62 , each of which leads to a circumferential groove  70 ), as explained below. More particularly, the mount retention ring interior wall  154  includes a plurality of longitudinal grooves  62  adjacent to the mount retention ring rear end  44 , each longitudinal groove  62  having a longitudinal groove forward end  64 , a longitudinal groove rear end  66 , a longitudinal groove length  68  extending from the longitudinal groove forward end  64  to the longitudinal groove rear end  66 , the longitudinal groove length  68  extending partially about the mount retention ring length  48 , each of the longitudinal grooves  62  configured to allow a lug  32  of the plurality of lugs to pass therethrough. The mount retention ring interior wall  154  further includes a plurality of circumferential grooves  70 , each of the plurality of circumferential grooves  70  located at the forward end  64  of a longitudinal groove  62  and extending partially about the mount retention ring circumference  50 , each of the plurality of circumferential grooves  70  configured to receive a lug  32  from a longitudinal groove  62  and having a circumferential groove rear side  72  defined by a rear ledge  52  in the interior wall  154  and the forward end  64  of a longitudinal groove  62  and a circumferential groove forward side  74  defined by a forward ledge  76  located in the mount retention ring interior  36 , the forward ledge  76  forwardly located relative to the rear ledge  52  within the mount retention ring interior  36 . The circumferential groove  70  includes a circumferential groove thickness  78  extending from the circumferential groove forward side  74  to the circumferential groove rear side  72 , a circumferential groove first radial side  80  located adjacent to one of the longitudinal grooves  62 , a circumferential groove second radial side  82  opposite the first radial side  80 , a circumferential groove length  84  extending from the first radial side  80  to the second radial side  82  and generally parallel to the mount retention ring circumference  50 . In other words, the circumferential groove lengths  84  are generally perpendicular to the longitudinal groove lengths  68 . The mount retention ring  34  further includes a plurality of indentations  58  (as best seen in  FIG. 5B ), each indentation  58  located in a rear ledge  52  adjacent to a second radial side  82  of a circumferential groove  70  and extending toward the mount retention ring rear end  44 . Each indentation  58  is a cut-out in a rear ledge  52  and matches the shape of a lug  32  as best seen in  FIG. 51B . The mount retention ring  34  further includes a plurality of mount retention ring threads  86  spaced about the exterior  38  of the mount retention ring  34 . The number of indentations  58 , circumferential grooves  70  and longitudinal grooves  62  is equal to the number of lugs  32  as each lug  32  is moved along a longitudinal groove  62 , into a circumferential groove  70  and into an indentation  58  as explained below, and best seen in  FIG. 4D . It will also be understood that herein use of the singular embraces use of the plural and use of the plural embraces use of the singular unless the context requires otherwise. Thus, the firearm barrel accessory system  10  may include only one lug  32 , in which case, only one longitudinal groove  62 , one circumferential groove  70  and one indentation  58  is required; however, multiple lugs  32  (preferably three lugs) is preferred and provides a securer attachment. 
     The firearm barrel accessory system  10  further includes a silencer barrel  88  comprising a silencer barrel interior  90  comprising the mount retention ring  34 , a silencer barrel exterior wall  152  (i.e., the outside of the silencer barrel  88 ), a silencer barrel front end  92  comprising a silencer barrel forward opening  94  leading to the silencer barrel interior  90  and configured to fire the ammunition, a silencer barrel rear end  96  comprising a silencer barrel rear opening  98  comprising the muzzle break  14  and leading to the silencer barrel interior  90 , a silencer barrel length  100  extending from the silencer barrel front end  92  to the silencer barrel rear end  96 , and plurality of silencer barrel threads  102  located in the silencer barrel interior  90  and mating with the mount retention ring threads  86 . When the ammunition is fired from the firearm  9 , the ammunition is configured to pass from the gun barrel  12 , through the muzzle break interior  16 , through the mount retention ring interior  36 , and out the silencer barrel forward opening  94 . The silencer barrel interior  90  preferably is configured to dampen/reduce noise emanating from the firearm barrel accessory system  10 . The silencer barrel interior  90  may include any suitable noise suppressing apparatus, including those now known or later developed, including without limitation baffles  128  located forwardly in the silencer barrel interior  90  relative to the silencer barrel threads  102 . The silencer barrel  88  comprises a longitudinal axis  156  parallel to the silencer barrel length  100  and passing through the silencer barrel interior  90 . Preferably, rotating/twisting the silencer barrel  88  (more particularly the exterior wall  152  of the silencer barrel  88 ) a first rotation about the longitudinal axis  156  relative to the muzzle break  14  and the gun barrel  12  when each lug  32  is located in a circumferential groove  70  and adjacent to the first radial side  80  and adjacent to a rear ledge  52  is configured to rotate the mount retention ring  34  so that each second radial side  82  moves toward and contacts a lug  32 , and further wherein rotating the silencer barrel  88  a second rotation in the same direction as the first rotation about the longitudinal axis  156  relative to the muzzle break  14  and the gun barrel  12  when each lug  32  is located in a circumferential groove  70  and contacting the second radial side  82  is configured to move the mount retention ring threads  86  about the silencer barrel threads  102  and to move the mount retention ring  34  longitudinally within the silencer barrel interior  90  toward the silencer barrel front end  92  so that the indentation  58  approaches and contacts one of the lugs  32 . 
     Preferably, the mount retention ring threads  86  are not configured to move about the silencer barrel threads  102  during the first rotation and the mount retention ring  34  is configured to remain a fixed distance from the silencer barrel front end  92  during the first rotation. In other words, the mount retention ring  34  only rotates relative to the muzzle break  14  during the first rotation—as opposed to moving longitudinally. 
     Preferably, the spacing between the lugs  32  along the muzzle break circumference  30  is substantially equal to the spacing between the longitudinal grooves  62  about the mount retention ring circumference  50 . 
     Preferably, the muzzle break  14  comprises a tapered portion  131  located forwardly relative to the lugs  32  and configured to contact a tapered portion  130  of the interior wall of the silencer barrel  88  when the plurality of lugs  32  are located in the plurality of circumferential grooves  70  and further wherein the contact between the tapered portion  131  of the muzzle break  14  and the tapered portion  130  of the interior wall of the silencer barrel  88  is configured to prevent the muzzle break  14  from moving toward the silencer barrel front end  92 . 
     Preferably, the forward ledges  76  are configured to prevent the plurality of lugs  32  from moving forwardly within the silencer barrel interior  90  beyond the forward ledges  76 . 
     Preferably, the entire mounting apparatus is configured to be operated by a user using one hand to rotate the silencer barrel exterior wall  152 . 
     Preferably, all components for attaching the muzzle break  14  to the silencer barrel  88  are located in the silencer barrel interior  90  when the silencer barrel  88  is locked to the muzzle break  14 . 
     Preferably, the muzzle break  14  further comprises plurality of gas ports  138  configured to reduce flash and further wherein the lugs  32  are located rearwardly relative to the gas ports  138 . 
     Preferably, each lug  32  comprises a lug width  140  generally perpendicular to the muzzle break circumference  30 , wherein each of the longitudinal grooves  62  comprises a longitudinal groove width  142  generally parallel to the mount retention ring circumference  50 , each indentation  58  comprises an indentation width  144  generally parallel to the mount retention ring circumference  50 , wherein the width  140  of each respective lug  32  is approximately equal in size to the width  142  of the longitudinal groove  62  that the lug  32  passes through, and further wherein the width  140  of each respective lug  32  is less than the length  84  of the circumferential groove  70  that the lug  32  passes through. Preferably, the width  140  of each respective lug  32  is substantially equal to the width  144  of the indentation  58  that the lug  32  is moved into. Preferably the lugs  32  are generally pyramidal in shape. Preferably, the lugs  32  each have a lug length  146  generally parallel to the muzzle break length  26  wherein the indentations  58  each have an indentation length  148  generally parallel to the mount retention ring length  48 , and further wherein the length  146  of each respective lug  32  is greater than the length  148  of the indentation  52  that the lug  32  is moved into. Preferably, each of the plurality of lugs  32  have the same shape. 
     To attach the silencer barrel  88  to the muzzle break  14 , the muzzle break  14  is inserted into the mount retention ring interior  36  so that the lugs  32  pass through the longitudinal grooves  62  and into the circumferential grooves  70  adjacent to the circumferential grooves first radial ends  80 . The silencer barrel exterior wall  152  is rotated the first rotation relative to the muzzle break  14  so that the lugs  32  move to the circumferential groove second radial ends  82 . The silencer barrel exterior wall  152  is then rotated the second rotation relative to the muzzle break  14  so that the lugs  32  contact the circumferential groove second radial ends  82  and cause the mount retention ring threads  86  to move along the silencer barrel threads  102  and cause the mount retention ring  34  to move forwardly within the silencer barrel interior  90  so that the indentations  58  move toward the lugs  32 . The attachment sequence is illustrated in  FIGS. 1A-1E and 8-11 , where the first rotation of the silencer exterior wall  152  relative to the muzzle break  14  is 60 degrees and the second rotation of the silencer exterior wall  152  relative to the muzzle break  14  is 120 degrees. (It will be understood that these degree intervals are merely exemplary and that other intervals may be used. It will also be understood that in operation of the system  10 , the second rotation will occur immediately after the first rotation without any pause by the user). More particularly, in  FIG. 1A , the muzzle break  14  is provided and, in  FIG. 1B , the muzzle break  14  is inserted so that the lugs  32  travel along the longitudinal grooves  62 . ( FIG. 8B  shows a cross-sectional view of  FIG. 1B  and it can be seen that the tapered portion  131  of the muzzle break  14  is contacting the tapered portion  130  of the interior wall of the silencer barrel  88 ). In  FIG. 1C  the silencer barrel exterior wall  152  and the mount retention ring  34  have been rotated 60 degrees counter-clockwise (into the page) relative to the muzzle break  14  as compared to  FIG. 11  and the lugs  32  have travelled along the circumferential grooves  62 , ( FIG. 9B  shows a cross-sectional view of the  FIG. 1C  rotation and it can be seen that a gap exists between the lug  32  and indentation  58 ). In  FIG. 1D  the silencer barrel exterior wall  152  has been rotated 30 degrees counter-clockwise (into the page) relative to the muzzle break  14  and the mount retention ring  34 , and the mount retention ring  34  has moved forwardly within the silencer barrel interior  90  relative to  FIG. 1C , as the mount retention ring threads  86  move along the silencer barrel threads  102 . In other words,  FIG. 1D  represents the halfway point of the second rotation. In  FIG. 1E  the silencer barrel exterior wall  152  has been rotated 30 degrees counter-clockwise (into the page) relative to the muzzle break  14  and the mount retention ring  34 , and the mount retention ring  34  has moved forwardly within the silencer barrel interior  90  relative to  FIG. 1D  as the mount retention ring threads  86  have continued to move along the silencer barrel threads  102 . Thus,  FIG. 1E  represents the end of the second rotation. ( FIG. 10B  is a cross-sectional view of the rotation of  FIG. 1E  and shows the lug  32  located in the indentation  58 ). At  FIG. 1E , the silencer barrel  88  is locked to the muzzle break  14  and the user can fire the firearm  9 . In  FIG. 4D , the muzzle break  14  is about to be inserted into mount retention ring interior  36 , and the arrows show how the lugs  32  are moved through the longitudinal grooves  62  and into the circumferential grooves  70 , then along the circumferential grooves  70  and then towards the indentations  58 . It will be understood that the arrows are provided for illustration purposes and in the attachment sequence of the system  10 , the user moves the lugs  32  through the longitudinal grooves  62  by moving the muzzle break  14  longitudinally into the silencer barrel interior  90  and then the muzzle break  14  and lugs  32  become stationary and the circumferential grooves  70  and the indentations  58  move relative to the stationary lugs  32  by the user rotating the silencer barrel exterior wall  152 . 
     The indentation length  148  may be very small. (e.g., from about 1/1000 to about 50/1000 of an inch so that the mount retention ring  34  only moves longitudinally a small amount within the silencer barrel interior  90 ). 
     To remove the silencer barrel.  88 , the silencer barrel exterior  152  is rotated clockwise 120 degrees relative to the muzzle break  14  so that the indentations  58  move away from the lugs  32 , the lugs  32  travel in the reverse direction along the circumferential grooves  70  and in the reverse direction along the longitudinal grooves  62  and the muzzle break  14  is moved out of the mount retention ring interior  36 . A purpose of the indentations  58  is to provide a cam action to assist in the reverse rotation of the silencer barrel exterior wall  152  relative to the muzzle break  14 . 
     The silencer barrel  88  may be comprised of a plurality of separate components, as best seen in  FIGS. 2 and 3 . For example, a tube locking ring  132  may form the rear end  96  of the silencer barrel  88 . The tube locking ring  132  may have a tube locking ring rear end  158  comprising the silencer barrel rear opening  98  and a tube locking ring forward end  160  comprising a plurality of tube locking ring threads  150 . The mount retention ring threads  86  may be disposed forwardly within the silencer barrel interior  90  relative to the tube locking ring threads  150  and the mount retention ring  34  may include a plurality of grooves  124  spaced about the circumference  50  of the forward end  40  of the mount retention ring  34 . Adjacent mount retention ring forward end grooves  124  are separated by a ridge  126 . The silencer barrel  88  may further include a ratchet retention ring  116  comprising a forward end  118  facing the forward end  92  of the silencer barrel  88  and a rear end  120  facing the plurality of the mount retention ring forward end grooves  124  and the ratchet retention ring  116  may include a plurality of holes  121  configured to receive the rear ends  114  of the retention pins  110  (described below), and a plurality of triangular teeth  122  configured to mate with the plurality of mount retention ring forward end grooves  124 . The silencer barrel  88  may further include a taper mount cap  134  disposed forwardly relative to the tube locking ring  132 , the taper mount cap  134  comprising a taper mount cap interior  162  comprising the mount retention ring  34 , the ratchet retention ring  116 , a taper mount cap ledge  123  disposed forwardly relative to the mount retention ring  34  and the ratchet retention ring  116  within the taper mount cap interior  162  and a plurality of taper mount cap threads  102  (i.e., previously referred to as the silencer barrel threads) configured to mate with the tube locking ring threads  150  and the mount retention ring threads  86 , the taper mount cap ledge  123  comprising a taper mount cap ledge circumference  164  and a plurality of spring recesses  135  spaced about the taper mount cap ledge circumference  164 . The silencer barrel interior  90  may further include a plurality of retention springs  104  seated inside the plurality of spring recesses  135 , each spring  104  having a forward end  106  and a rear end  108 . The taper mount cap interior  162  may further include a plurality of retention pins  110  located inside the taper mount cap interior  162 , each retention pin  110  having a forward end  112  attached to a rear end  108  of a retention spring  104  and a rear end  114  attached to the ratchet retention ring  116 . Optionally, the taper mount cap  134  may be attached to a sleeve  136  comprising a sleeve interior  166  comprising a plurality of baffles  128  and forming the forward end  92  of the silencer barrel  88 . In such embodiments, the sleeve  136 , the taper mount cap  134 , the ratchet retention ring  116  and the tube locking ring  132  may be rotatable along the silencer barrel longitudinal axis  156  relative to the mount retention ring  34  and the muzzle break  14 , wherein rotation of the sleeve  136 , the taper mount cap  134 , the ratchet retention ring  116  and the tube locking ring  132  relative to the mount retention ring  34  causes the mount retention ring  34  to move along the taper mount cap threads  102  and the silencer barrel length  100  and causes the teeth  122  to move about the mount retention ring forward end grooves  124 , wherein the retention pins  110  exert tension on the ratchet retention ring  116  in the rear direction. Optionally, rotation of the sleeve  136 , the taper mount cap  134 , the ratchet retention ring  116  and the tube locking ring  132  relative to the mount retention ring  34  causes the mount retention ring  34  to move along the taper mount cap threads  102  and to move forwardly along the silencer barrel length  100  (and to move forwardly relative to the muzzle break  14 ). Among other advantages, the ratchet ring  116  is designed to prevent the mount retention ring threads  86  from unscrewing from/moving along the taper mount cap threads  102  during vibration occurring from shooting ammunition. 
     The drawings provided herein are engineering drawings to scale. However, it will be appreciated that other dimensions and component ratios are possible. 
     Having now described the invention in accordance with the requirements of the patent statutes, those skilled in the art will understand how to make changes and modifications to the disclosed embodiments to meet their specific requirements or conditions. Changes and modifications may be made without departing from the scope and spirit of the invention. In addition, the steps of any method described herein may be performed in any suitable order and steps may be performed simultaneously if needed. 
     Terms of degree such as “generally”, “substantially”, “about” and “approximately” as used herein mean a reasonable amount of deviation of the modified term such that the end result is not significantly changed. For example, these terms can be construed as including a deviation of at least ±5% of the modified term if this deviation would not negate the meaning of the word it modifies.