Patent ID: 7316093
Filing Date: 2008-01-08
Classification: F42B

Abstract:
1. A firearm and munitions kit, comprising: a cylindrical insert adaptable to being press fitted inside an original barrel of a firearm so that a distal end of the insert is concentrically proximate to a muzzle of the original barrel and a proximal end of the insert is concentrically proximate to a breech end of the original barrel; the cylindrical insert also having a cylindrical collar at the proximal end to provide an axial stop against the breech end of the original barrel; the cylindrical insert further including an axial through bore provided to accept a .223 caliber bullet for firing; the through bore at the most proximal end of the cylindrical insert having a body bore first inside diameter extending axially towards the muzzle, to a body bore second inside diameter; a ratio of the body bore first inside diameter to the body bore second inside diameter being within the range of (1.008:1) to (1.013:1); the through bore having an approximate 29 degree shoulder angle as it further extends axially towards the muzzle for a predetermined axial shoulder length; the ratio of the body bore length to the predetermined axial shoulder length being within a range of approximately (5.95:1) to (7.95:1); a further axial extension of the through bore having a constant diameter and forming a neck bore having a predetermined neck bore axial length; a ratio of the predetermined axial shoulder length to the predetermined neck bore axial length being approximately (1:1); the remainder of the axial through bore extending to the muzzle comprising a barrel bore having an inside diameter of approximately 0.224 inches, wherein the total barrel length is no greater than the original barrel length; a munitions comprising a cartridge having a hollow inside space; the munitions further comprising the .223 caliber bullet; the cartridge having a conforming shape to fit snugly inside the body bore, shoulder bore and neck bore of the cylindrical insert; the cartridge conforming shape comprising a body having a body first outside diameter, a body second outside diameter, a body length, and an extraction groove; a ratio of the body first outside diameter to the body second outside diameter being within the range of (1.008:1) to (1.02:1); the cartridge further comprising a shoulder having a shoulder angle of approximately 29° with respect to an axial centerline of the cartridge; the shoulder angle being provided so that the shoulder tapers while extending axially forward of the body to form a predetermined cartridge shoulder length; a ratio of the body length to the predetermined cartridge shoulder length being within a range of approximately (6.75:1) to (7.95:1); the cartridge further including a neck disposed axially forward of the shoulder, the neck having a neck outside diameter and a neck length; the neck outside diameter being substantially less than the body second outside diameter; a ratio of the predetermined cartridge shoulder length to the predetermined neck length being approximately (1:1); a moderately fast burning spherical gunpowder being uniformly disposed in the hollow inside space of the cartridge; an opening of the neck being closed off by and fitted to the bullet; the munitions capable of being operatively stored in an unmodified magazine of the firearm; wherein upon firing the munitions from the firearm which has been adapted by the firearm and munitions kit, the bullet is capable of reaching a minimum velocity of greater than 2,000 fps.