Firearm of interconvertible calibers

Details Firearm of interconvertible calibers Firearm of interconvertible calibers

1978-10-13

1981-03-03

Bentley, Stephen C.

Ordnance

Automatic

Movable barrel

42 25, 42 77, F41D 1100

Patent

active

042533775

ABSTRACT:
An automatic pistol of the breech block type which is interconvertible to fire sub-caliber cartridges. The frame, handle, slide, ejector and firing mechanism of the larger caliber pistol are used when converting for sub-caliber usage. A sub-caliber barrel is mounted in the slide and detachably connected to the frame by a pivotal link. An interchangeable barrel bushing adapted to support the forward end of the sub-caliber barrel is inserted in the slide. At the forward end of the slide a recoil spring is tensioned to operate the slide upon firing of a sub-caliber cartridge. A sub-caliber magazine is inserted in the handle. The extractor is cambered and is sufficiently flexible to capture and extract cartridges of both calibers. The cartridge locating recess in the breech face is that of the larger caliber.

REFERENCES:
patent: 745561 (1903-12-01), Bergersen
patent: 3504594 (1970-04-01), Greeley
patent: 4127056 (1978-11-01), Kart
James M. Triggs, "Colt Automatic .32 and .380 Pocket Pistol", NRA Illustrated Firearms Assembly Handbook, p. 6.

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