Ordnance – Automatic – Firing device operation or control
Patent
1975-12-30
1977-11-08
Brown, David H.
Ordnance
Automatic
Firing device operation or control
89128, 89142, F41D 504, F41D 1102
Patent
active
040570037
ABSTRACT:
An open-bolt firing conversion for the standard M16 rifle, which allows the rifle to be converted to open-bolt firing by replacement of parts and without otherwise altering the rifle. The open-bolt conversion is hammer-fired for reliability and preservation of the cyclic firing rate, and the conversion hammer straddles the conversion sear within the conventional M16 lower receiver. The open-bolt converted rifle can fire either semiautomatic or full-automatic under control of the conventional firing selector lever.
The cyclic rate reducer is installed in a conventional M16 rifle, without further modification to the rifle, to lower the automatic fire cyclic rate to approximately 350 rounds per minute. The cyclic rate reducer includes an actuator assembly which is received behind a modified bolt carrier, and which is released to move forward and contact an automatic sear release only after the bolt carrier has completed at least a substantial portion of its forward movement. The actuator assembly includes provision for preventing the actuator assembly from bouncing rearwardly at the time of weapon recoil, before the gas-actuated rearward movement of the bolt carrier.
The variable vector muzzle compensator receives the high-pressure gases at the muzzle of a firearm, and channels these gases to provide a force vector in a selected direction perpendicular to the line of fire. The direction of the gas force vector can be adjusted to accommodate a particular shooter, and the compensator is particularly effective to reduce muzzle climb in fully-automatic firearms.
The multiple magazine apparatus includes a number of magazines bracketed together in a semi-permanent assembly, so that each loaded magazine is ready for insertion into a firearm as soon as the preceding magazine is emptied. Each individual magazine has provision for preventing the top round of the magazines not in the receiver housing from being dislodged when the firearm and the multiple magazine assembly recoil during firing. An auxiliary catch is provided to retain the magazines of the magazine assembly on the receiver of the firearm.
The night sight apparatus is easily and removably attachable to a conventional M16 rifle without replacement or modification of the conventional sights, and provides a luminous sighting reference for shooting during low levels of ambient light.
REFERENCES:
patent: 2383487 (1945-08-01), Johnson
patent: 3045555 (1962-07-01), Stoner
patent: 3318192 (1967-05-01), Miller et al.
patent: 3618455 (1971-11-01), Plumer et al.
patent: 3715954 (1973-02-01), Rude
patent: 3724325 (1973-04-01), Silsby
patent: 3846928 (1974-11-01), Ruger et al.
patent: 3960053 (1976-06-01), Conley
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