Firearms – Barrels – Choke devices
Patent
1992-12-04
1993-12-28
Johnson, Stephen M.
Firearms
Barrels
Choke devices
89 143, 89 1405, F41A 2118, F41A 2140
Patent
active
052728277
ABSTRACT:
A short length shotgun barrel exhibiting high accuracy and reduced felt recoil, and providing for interchangeability of loads containing shot pellets and slugs. The barrel includes an elongated and tapered forcing cone, a backbored region between the muzzle and the forcing cone, venting ports positioned in the area of the muzzle, and a muzzle region of smaller diameter than the backbored region. The nominal inside diameter of the barrel from the forcing cone to a point adjacent the muzzle is greater than the muzzle diameter. Radially projecting ports are provided in the transition area of the backbored region near the muzzle end of the barrel, and the area surrounding the venting ports is roughened. The forcing cone is elongated and tapered down from the chamber toward the muzzle end of the barrel.
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English translation of French pat. #615,566 (SteFafno).
Calos Carl D.
Vang Hans J.
Johnson Stephen M.
O'Banion John P.
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