Patent ID: 7661349

Claim:
An apparatus for providing secure attachment and quick detachment of a noise suppressor to the muzzle of a firearm barrel having an axial bore, comprising: an attachment fixture having an aperture and configured to be secured to the muzzle of a firearm barrel such that the aperture is axially aligned with the bore, said fixture having an annular abutment configured to provide a substantially forwardly facing abutment surface, an annular series of circumferentially-spaced teeth, and an external thread; and a noise suppressor having a body with a rearward end and an axial aperture therethrough, said rearward end including an opening aligned with the axial aperture and configured to receive at least a portion of said fixture, an abutment surface, an internal thread configured to engagingly mate with the fixture thread, and a lever member positioned proximate to the rearward end having a ratchet pawl and manually movable between first and second positions, said member being spring-biased for substantially radial movement of the pawl into engagement with the fixture series of teeth in the first positions, whereby, upon insertion of at least a portion of the fixture into the opening, rotation of the suppressor body relative to the fixture in a thread-engaging direction will cause the ratchet pawl to be circumferentially moved over the fixture teeth until the annular abutment of the fixture contacts the suppressor abutment surface and engagement of the pawl with the teeth prevents rotation of the suppressor body in a thread-disengaging direction upon assembly unless the lever member is manually displaced to the second position.