摘要:
There is disclosed a gas operated, fully automatic weapon system with a d feed mechanism having a long recoil, soft cycle operation. The automatic weapon system consists of six groups or sub-assemblies. These are the backplate (rear end cap/fire control assembly), the dust cover unit, the dual selective rotary feed unit, the operating group unit, the receiver unit, and the barrel unit. These sub-assemblies combine to provide a weapon characterized by lightness of weight, relatively slight recoil force, relatively slow gunfire rate, excellent manual control resulting in good burst fire accuracy in hitting targets, and safety during operation and disassembly.
摘要:
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.
摘要:
A gas-operated firearm is disclosed in which the gas port is located in the forward part of the chamber, in the part of the barrel bore wall which surrounds the portion of the bullet projecting from the case of a chambered cartridge. In the disclosed firearm the bolt remains locked in its breech-closing position until the gas pressure resulting from the detonation of a cartridge drops to practically zero (gauge). The bolt, which rides on guide rails in the receiver, is provided with a pivotable locking member constructed and arranged to engage locking recesses in the guide rails when it is pivoted into one of its extreme positions. The locking member can be withdrawn from engagement with the locking recesses in the guide rails, and the bolt impelled rearwardly, when a lug projecting from the locking member is struck by a cam which is pivotably mounted in the receiver. An operating slide, mounted in the receiver for sliding parallel to the sliding motion of the bolt, is driven rearwardly in the receiver by the pressure of the gas resulting from the detonation of a cartridge in the chamber driving a ram from a cylinder and compressing the operating slide return springs. When the gas pressure in the cylinder, resulting from the detonation of the cartridge, has dropped to a very low level or zero (gauge) the operating slide is driven forward by the action of its return springs and the operating slide engages the operating cam, rocking it sufficiently to disengage the locking member from its associated recesses in the bolt guide rails and driving the bolt rearwardly. Extraction and ejection of the spent cartridge and cocking of the hammer and trigger mechanism takes place in the well known manner during the rearward travel of the bolt. When immediately thereafter the bolt is driven forward by its return springs a new cartridge is stripped from the magazine and chambered and the locking member is re-engaged with its cooperating locking recesses in the bolt guide rails by spring action, by the action of a depressor plunger mounted in the bolt which strikes the rear face of the barrel block as the breech is closed by the returning bolt, or both. The firing pin is held out by the locking member when the locking member is in its bolt-unlocked position, so that the arm can be fired only when the bolt is locked in its breech-closing position.
摘要:
A lightweight one man portable automatic gas-operated weapon system for intry use having symmetrical forces applied to recoiling parts by use of two parallel gas pressure actuated rods acting in unison. An integral sprocket feed system is actuated by the recoiling parts and avoids gross asymmetrical force movements about the weapon's center of gravity resulting from shifting ammunition weight. A dual tube receiver and dual gas system is featured in the weapon. Major weapon subassemblies comprising modules are operatively interrelated to facilitate replacement during field use of the weapon.
摘要:
The machine gun of this invention features a unitary bolt and bolt drive assembly reciprocably mounted within a receiver along three longitudinally extending bearing supports symmetrically arranged in spaced relation to the receiver; the bolt and bolt drive assembly, together with a recoil buffer constituting an integral operating group removably maintained within the receiver by a single latch mechanism; a bolt carrier of the assembly incorporating actuating means for cartridge belt advance, cartridge extraction and ejection; the bolt carrier housing not only a rotary, front-locking bolt but also a cam follower which fixes a firing pin to the carrier and moves within a contoured slot in the bolt for locking and unlocking it in battery. This machine gun also features a gas recoil system for the bolt and bolt drive assembly having anti-fouling porting means for purging gas from the system under high pressure after firing; an ejector operated by the recoiling bolt and bolt drive assembly independently of its velocity; an automatically engageable, selfaligning barrel and receiver latch construction; and a sight assembly featuring a zero backlash precision screw adjustment means.
摘要:
An automatic rifle is disclosed, of the type which exploits the pressure of the explosion gases for cocking the bolt, the improvement consisting in a simplified arrangement for the guiding tube in which the gas-actuated plunger or piston is slidably housed. A limited number of component parts ensures a longer service life for the rifle and the assembling and disassembling operations are considerably facilitated. An improved sighting arrangement is also disclosed.
摘要:
An M16-type automatic rifle is provided with an improved gas operating system. The tube extending forwardly from the bolt carrier key is of such length that it permanently mates with the aftwardly extending gas transfer tube as the bolt carrier key shuttles forward and aftward in operation. This arrangement minimizes fouling by combustion products from the firing of ammunition. Modifications to the gas transfer tube and barrel nut assembly accommodate the extended bolt carrier key tube and facilitate quick change of the barrel in the field with a standard tool.
摘要:
Improvements to the M60 7.62-mm machine gun (1) to enable it to be cocked after the cover assembly has been closed without opening the latter (2) to minimize the possibility of a runaway gun (3) to enable a hot barrel to be changed without the necessity of using protective hand coverings (4) to eliminate the necessity of providing a bipod support assembly for every spare barrel (5) to provide for better control of the gun when firing from a standing position and (6) to simplify the construction of the gas cylinder and piston.
摘要:
A gas operated system for use in semiautomatic firearms is disclosed. The gas operated system utilizes a gas powered assembly which is actuated by gas under pressure. The gas powered assembly is utilized to provide rearward motion to a drive assembly. The drive assembly has a rod associated therewith which engages unlocking structure so that this structure unlocks locking structure so that the bolt assembly can move rearwardly from the battery position. Movement of the bolt assembly rearwardly is accomplished principally due to expanding gas present in the barrel of the firearm which acts against the face of the bolt assembly.
摘要:
Anti-bounce apparatus for an automatic cannon reciprocating bolt assembly which includes a bolt, a bolt carrier and bolt mounted locking lugs, comprises means defining engagement surfaces contoured for enabling the forward moving carrier to cam the lugs into bolt locking relationship with a cannon breech at increasing velocity, without bouncing, carrier energy loss being thereby minimized and firing of a chambered shell by a carrier mounted firing pin being assured. Further comprising the anti-bounce apparatus is a plurality of inertially actuated locking collets connected to the bolt carrier for causing, responsive to impact of the carrier with the breech at the instant of firing, frictional locking between the carrier and portions of the cannon fixed to the breech, rearward bouncing of the carrier relative to the locking lugs, with consequent premature or erratic bolt unlocking, being thereby prevented.