Self cleaning automatic machine pistol and silencer for the same

Details Self cleaning automatic machine pistol and silencer for the same Self cleaning automatic machine pistol and silencer for the same

1989-05-05

1990-12-18

Bentley, Stephen C.

Ordnance

Automatic

Breech block lock

89 143, 89 144, 8919101, 89199, 42 7, 42 16, F41A 524

Patent

active

049778153

ABSTRACT:
An automatic machine pistol is provided, which is not subject to fouling, which is compact and light while incorporating a pneumatic recoil buffer, which resists muzzle climb, and which can be accessed and cleaned without disassembly. The machine pistol is comprised of a reciprocating bolt within a housing of the pistol. The reciprocating bolt is carried within the housing on four rails by eight roller bearings. No sliding contact is made between the bolt and any other portion of the pistol. A portion of the high pressure gas from the barrel is bled through a bleed hole in the barrel block or barrel into a gas port tube which is telescopically inserted into the bolt. The gas port tube delivers the portion of the discharge gas in a forward direction in opposition to the motion on recoil. An upwardly directed nozzle is communicated to the receiving bore within the bolt. The direction and force of the discharge gas within the gas port delivery tube and receiving bore within the bolt resist and buffers recoil, while the upwardly directed nozzle develops a downward thrust on the muzzle end of the pistol to avoid muzzle climb.

REFERENCES:
patent: 1834021 (1931-06-01), Destree
patent: 2003066 (1935-05-01), Brondby
patent: 2685754 (1954-08-01), Crittendon et al.
patent: 2771819 (1956-11-01), Morse et al.
patent: 3246567 (1966-04-01), Miller
patent: 3990346 (1976-11-01), Irwin
Smith, Walter H. B, Pistols and Revolvers, 1946. p. 607.
Cowgill, James P., "Revolutionary Handgun From Heckler & Koch", American Rifleman, vol. 126, No. 5, May 1978, pp. 22-24.

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