Abstract: An automatic firearm having an inertial automation system comprises a barrel, which is movable along its own axis, a bolt support with a bolt, a recoil spring, a buffer spring and a hammer spring, a trigger mechanism, an ammunition feed mechanism, a mechanism for coordinating the actual firing, and a bolt support latch. The springs and the mechanism for coordinating the actual firing ensure a constant-value recoil force during automatic fire. Technical result consists in the improvement of the shooter's operating conditions, reduced vibration, and decreased bullet dispersion.

Abstract: An upper receiver for the one family of firearms allows for the use of a bolt of another firearm family in the firearm action. In the depicted embodiment, an AR-15 bolt and its carrier group are simple drop-in with only the addition of a sear plate, clamp, and an insert into the bolt carrier group. The depicted receiver is designed to also prevent its use on the semi-automatic variants of the MAC family.

Abstract: A buffer assembly includes a stopper supported at a rear end of an extension tube of a firearm, a buffer slidably supported at a front end of the extension tube, and a coil spring. The coil spring has an outer diameter slightly smaller than an inner diameter of the extension tube to maximize a diameter size of the coil spring. The coil spring has a front end coupled at a front end of the buffer and a rear end coupled at a rear end of the stopper to maximize a length of the coil spring. The buffer is slid within the extension tube in a linear manner that the coil spring urges the buffer at the forwardmost position of the extension tube. When the buffer is pushed rearweadly in a linear slidable manner to compress the coil spring, the coil spring pushes the buffer back to its initial position.

Abstract: A firearm is adapted to use linked ammunition, either as a stand-alone firearm or a kit for the firearm. A belt feed lever is actuated by a drive roller in communication with the firearm recoil assembly. The belt feed lever turns a vertical drive shaft. The drive shaft operates a lower pawl, the manipulation of which advances the next round of linked ammunition to a position above the feed ramp. The firearm feeds linked ammunition “upside down,” that is, with the links facing downward. A box mount is fitted in place of the standard box magazine when the firearm is used to fire linked ammunition, thereby providing a feed tray and feed follower. To convert back to the use of ammunition fed from magazines, the user need only remove the box mount and replace it with a traditional box magazine.

Abstract: A buffer assembly has a rod, a cap having a forward end against which a bolt carrier pushes during a firing cycle, the cap being movable along the rod, a shock absorbing plug attached to a rearward end of the rod for engaging an end wall of a receiver extension during an intermediate part of the firing cycle, a buffer tube moveable on the rod, a buffer spring engaged between the plug and the buffer tube for biasing the buffer tube toward a forward position, a counterweight mounted for movement on the rod, a shock absorbing washer between the counterweight and the cap for smoothing an impact between the counterweight and the cap at an end of the firing cycle, and a counterweight spring that is weaker than the buffer spring, for biasing the counterweight toward the cap.

Abstract: Certain embodiments disclose rate reducer systems and methods to reduce the cyclic rate of self-powered firearms. The reduction in cyclic rate is achieved by mechanically delaying the firing step in the cycle of functioning. This delay is achieved by temporarily latching an inertia weight at the rear of the recoil stroke while the recoiling parts return to battery (i.e. a firing position). When the recoiling parts go into battery, the inertia weight is released and urged forward. At the forward end of its travel, the inertia weight actuates the firing mechanism.

Abstract: Certain embodiments disclose rate reducer systems and methods to reduce the cyclic rate of self-powered firearms. The reduction in cyclic rate is achieved by mechanically delaying the firing step in the cycle of functioning. This delay is achieved by temporarily latching an inertia weight at the rear of the recoil stroke while the recoiling parts return to battery (i.e. a firing position). When the recoiling parts go into battery, the inertia weight is released and urged forward. At the forward end of its travel, the inertia weight actuates the firing mechanism.

Abstract: This invention is a serviceable buffer for an AR-type rifle such as the AR-15. This invention satisfies the need for the user to adjust said buffer weight by opening the buffer housing and adding or removing internal weights to achieve the desired recoil effect. In order for the firearm to function properly, buffer weight is a critical factor in the ejecting of the spent shell casings from the firing chamber and cycling of the firearm.

Abstract: A firing frequency controller which includes a cylinder body, a piston assembly, and a unidirectional seal is provided. The cylinder body includes a first orifice, a second orifice and a third orifice, wherein the gas flux through the first orifice and the third orifice are inequality. The piston assembly disposed inside said cylinder body is repeatedly moved. The unidirectional seal is disposed at outside of the piston and adjacent to the inner wall of the cylinder body. The unidirectional seal is contacted with the cylinder body and is kept airtight while moved at one direction. The unidirectional seal is not contacted with the cylinder body and kept non-airtight while moved at another direction. Because of pressure difference, the velocity of piston assembly can be adjusted and then the firing frequency of toy gun can be controlled.

Abstract: A semi-automatic firearm has forward and rearward ends. A receiver has a safety selector aperture, a barrel, a reciprocating loading mechanism and a magazine. A trigger finger and inner portions. The inner portion has a seat with a groove. A disconnector has a hammer hook coupled to the trigger. A trigger mounting pin couples the trigger to the firearm. A trigger disconnector spring couples the trigger and the disconnector. A hammer having an upper striking portion with a disconnector hook receptacle. A hammer mounting pin couples the hammer to the firearm. A hammer spring is coupled to the hammer and hammer mounting pin. A cam body subassembly comprises a cam body housing, a cam and a cam mounting pin. The cam body subassembly is coupled to the firearm. A safety selector is coupled to the firearm. A trigger extender is mated with the upward trigger groove.

Abstract: A blow-back operating automatic firearm has a sliding mass carried with its bolt carrier assembly to increase the dwell time of the bolt at the breech when the bolt is in battery position for firing. The sliding mass reduces the tendency of the bolt to bounce-off the head end of the seated cartridge, thereby reducing the risk that a misfiring will occur.

Abstract: A firearm buffer system that reduces the rate of fire of a full automatic firearm that has a gas port wear and reduces the adverse effect of bolt bounce. The firearm buffer system includes a buffer assembly that has an elongated buffer body having an elongated hollow interior with a dosed end and an open end and a plurality of weights sized and shaped to reciprocate in the elongated hollow interior of the buffer body. Springs are located in the elongated hollow interior of the buffer body for positioning at least some of the weights apart from each other and a movable buffer plunger is reciprocally mounted in the open end of the elongated hollow interior of the buffer body. The movable buffer plunger is sized so that it does not come into operation until a predetermined amount of wear occurs at the firearm's gas port. In one embodiment a spacer member is provided to permit the buffer assembly to be used with a firearm having a full sized buttstock.

Abstract: The gun may have a receiver element with a barrel extending forwardly from the receiver element with the barrel having a chamber end and a discharge end. A handle element may be attached to the receiver element and a trigger assembly may be integrated with the handle element. The receiver element may have a bolt carrier chamber formed therein and a bolt carrier assembly slidably disposed in the bolt carrier chamber. The bolt carrier chamber at a rearward portion thereof and the bolt carrier assembly may define a gas chamber. A bolt assembly may be slidably disposed in the bolt carrier assembly. An actuator may be slidably engaged with the receiver element and may be engageable with the bolt carrier assembly and the bolt assembly. A firing pin assembly may be slidably disposed in said bolt assembly and may have a firing assembly in communication with said trigger assembly.

Abstract: A device is disclosed for a weapon for firing burst of several shots. The device unlocks and latches the rifle bolt in the rear position to avoid heat distribution from the chamber or barrel to the powder or explosives in the booster charge or the explosive projectile, and to prevent firing by emptying or handling the weapon. The activator moves the trigger into engagement with the stop flap of the rifle bolt, thereby releasing the spring force of the rifle bolt forwardly during firing only when the rifle bolt and the cover are in the locked position.

Abstract: A buffer assembly for use with firearms such as the M-16 rifle, for reducing the cyclic rate of firing in full-automatic operation. The buffer assembly includes a unit of length selected to stop the bolt carrier at the desired full-recoil position, and a mass movable relative to that unit. When the bolt carrier stops at full-recoil, inertia causes the mass to continue moving rearwardly while further compressing the action spring. The action spring then returns that mass forwardly to contact the fixed portion of the buffer assembly, returning the bolt carrier to battery position. The bolt carrier remains at rest in recoil while the moveable weight slides rearwardly and then returns forwardly relative to the bolt carrier, thereby increasing the cycle time of firing and correspondingly reducing the cyclic rate of fire for the firearm.

Abstract: A gun capable of fully automatic firing having a trigger mechanism comprising; an arrest mechanism operable to interrupt ammunition discharging mechanism, the arrest mechanism comprising a cam element which cooperates with a complementary cam element of a timing device, and wherein the timing device comprises an electric motor operable to drive the complementary cam element when a physically displaceable trigger of the trigger mechanism is moved to a firing position and when the gun is in a fully automatic mode of operation, the timing device being operable to effect cyclical release of the discharge mechanism by said arrest mechanism.

Abstract: Applicant's device improves rapidly firing guns. When such a gun fires, applicant's device delays departure of the gun bolt from the chamber or barrel zone holding a spent round's casing until barrel pressure drops to a safe level. The device has a hollow piston which is translatable fore and aft along the barrel and which has an orifice communicated to a duct from an inner barrel diameter to an outer barrel diameter. The duct slants forward toward the gun muzzle in a radially outward direction so as to direct expanding propellant gas from the barrel against a forward internal surface of the piston. Momentum of the gas keeps the piston in its most forward position and the piston solidly connects to the bolt so that the bolt stays at the chamber when the piston is pressurized.

Abstract: A fire rate control mechanism which allows an open bolt or closed bolt S.M.G. or L.M.G. to be, upon firing, momentarily arrested in a cocked condition and then to be released to fire another round after a predetermined and preset lapse of time.

Abstract: A semiautomatic firearm including a recoil spring acting on the bolt for closing the breech after the ejection of the case. The repositioning device includes an auxiliary resilient member which cooperates with the recoil spring, so that although a low-rigidity spring suitable for weak cartridges is used, the weapon works correctly even when firing powerful cartridges. The device thus allows to use a wider range of cartridges and reduces the negative effects of recoil.

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.

Abstract: A dual rate of fire mechanism in an automatic weapon absorbs and dissipates portion of the recoil energy to produce a slow firing rate and inactivates the energy absorbing elements to produce a rapid firing rate. Compression of a recoil spring stores the recoil energy of the weapon bolt and normally returns substantially all of the energy to the bolt in a counter recoil portion of the cycle. In slow firing mode, some of the energy stored in the recoil spring is dissipated in a positioning spring thus providing less energy to the counter recoil action and slowing the rate at which succeeding rounds are fired.

Abstract: An automatic weapon incorporating a retarded blow back, a cartridge and bolt centering assembly, light weight and minimum component construction, simplicity in disassembly, easily detachable barrel, unique belted ammunition feed system, disposable ammunition box, a guide buffering assembly, muzzle brake, remote firing capability, front sight charging system and a bulkhead recoil absorbing arrangement.

Abstract: An automatic firing weapon embodying a support, a weapon housing displaceable relative to the support, a breechblock displaceable in the weapon housing. The breechblock is retained in its rearward position by means of a pawl pivotably mounted at the weapon housing and can be released by means of an actuation lever which pivots the pawl. Further, there is provided a trigger arranged at the support and a guide track for triggering series firing. Apart from the aforementioned guide track there is provided a further, curve-shaped guide track for triggering a rapid individual firing operation and by means of which the pawl, during return movement of the weapon housing, is rocked into the path of the breechblock and during the advancing or forward movement of the weapon housing is rocked out of such path. The trigger can be selectively operatively connected through the intermediary of one of both guide tracks and via the actuation lever with the pawl with the aid of a switching mechanism.

Abstract: Methods and apparatus for reducing the cyclic firing rate of automatic wens by providing a rate reducing assembly which transmits a portion of the linear recoil and counterrecoil forces of the weapon bolt carrier through a cam follower to rotate a receiver carried inertia drum having a helically curved cam groove.