Patent ID: 6769209
Filing Date: 2004-08-03
Classification: F41A

Abstract:
A removable inner barrel apparatus comprising:a rifle having a barrel extending therefrom, said barrel having a sight point at a top thereof, said barrel having a polished inner wall without striping, said barrel having an external thread at an end thereof and a top ring positioned between said external thread and said sight point, said top ring positioned adjacent said sight point, said top ring being an annular ring or a fixed jacket; an inner barrel having an end through which ammunition can exit said inner barrel being a tube having an outer diameter corresponding to an inner diameter of said barrel of said rifle, said inner barrel having a grooved hollow interior, said interior of said inner barrel having a diameter corresponding to a diameter of the ammunition, said inner barrel having a bushing affixed adjacent an opposite end of said inner barrel, said bushing having an outer diameter that is the same as an external diameter of said barrel of said rifle, said bushing having a surface abutting said end of said barrel of said rifle when said inner barrel is introduced within said barrel of said rifle, said inner barrel having said end extending outwardly of an opposite end of said barrel of said rifle where the ammunition is introduced; a pressure nut removably fastening said barrel of said rifle to said inner barrel, said pressure nut formed of an cylindrical piece having grooves formed on an exterior face thereof, said pressure nut having a drilled interior, said pressure nut having an orifice at one end that has a diameter greater than said external diameter of said barrel of said rifle, said pressure nut having a thread on said drilled interior, said thread engaging said external thread of said barrel so as to retain said inner barrel within said barrel of said rifle; and a compression spring positioned within said pressure nut adjacent said orifice thereof, said compression spring urging against an opposite surface of said bushing so as to to urge said surface of said bushing against said end of said inner barrel.