Automatic firearm

Details Automatic firearm Automatic firearm

1990-11-27

1991-08-13

Brown, David H.

Ordnance

Automatic

Blow back breech block

42 25, 89130, F41A 1500

Patent

active

050386662

ABSTRACT:
An automatic firearm of especially simple construction and easy maintainability, having an adjustable cyclic firing rate. The firearm has a receiver with an upper and lower portion. The upper portion defines a cavity in which a bolt assembly reciprocates. The reciprocation is maintained by a single compression spring in the cavity, and the length of the cavity, and compression of the spring, are adjustable to vary the cyclic firing rate. The firearm includes an especially simple trigger group arrangement. The lower receiver portion is structured to protect the trigger group. Also disclosed is an especially simple, yet practical ejector mechanism.

REFERENCES:
patent: 1144285 (1915-06-01), Becker
patent: 1518355 (1924-12-01), Reibel
patent: 1802422 (1931-04-01), Heinemann
patent: 2049776 (1935-04-01), Hyde
patent: 2115526 (1938-04-01), Holek
patent: 2389095 (1945-11-01), Vesely
patent: 2470158 (1949-05-01), Grazda
patent: 2539554 (1951-01-01), Sampson et al.
patent: 2632391 (1953-03-01), Kintzinger
patent: 3788191 (1974-01-01), Rose et al.
patent: 4028993 (1977-06-01), Reynolds
patent: 4057003 (1977-11-01), Atchisson
patent: 4344351 (1982-08-01), McQueen
patent: 4355563 (1982-10-01), Swieskowski
patent: 4649800 (1987-03-01), Tessier

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