Abstract: Provided herein are buffer systems, bolt assemblies, firearms, and related methods, devices, and assemblies. A bolt carrier assembly for a firearm of an example includes: a bolt carrier body defining a cavity extending along a longitudinal axis of the bolt carrier; at least one weight disposed within the cavity; a forward stop at a forward end of the cavity; and an aft stop at an aft end of the cavity. In some embodiments, the bolt carrier assembly may include a spring, where the spring biases the at least one weight along the longitudinal axis toward at least one of the forward stop or the aft stop, where the at least one weight is configured to be driven against the spring bias in response to a firing action of the firearm.

Abstract: A configurable blowback bolt system is provided. Embodiments include a two-part configurable bolt assembly having a bolt carrier and a configurable bolt that allows for use with various calibers of ammunition, both rifle and pistol. The configurable bolt may also eject cartridges to the right or left side of the rifle by moving the extractor to one or the other side of the bolt. A buffer may be included as part of the configurable blowback bolt to shorten the stroke based on the caliber of ammunition being fired with the configurable blowback bolt system.

Abstract: Disclosed herein is a modified rifle bolt carrier allowing a selectively openable vent/valve at the location where exhaust gas is pressurizing the bolt carrier to control carrier speed under suppressed fire in a first valve position or unsuppressed fire in a second valve position. A valve core is disclosed which may be rotated 180° to a first “open” setting for non-suppressed fire from its position in a “closed” position for suppressed fire, and a third “median” position. The modified bolt carrier will allow an operator of the firearm to adjust for a suppressor without changing the gas block or having to modify or adapt the front end or barrel end of the firearm.

Abstract: A locking block device (100) provided in the region of a cartridge chamber (121) of a handgun barrel (120) has a locking block (110) for releasably locking the barrel (120) to a breech prior to firing, and has a control member (111) having a control guide (112) for swinging out the barrel (120), after firing, for the purpose of separating the barrel (120) from the breech, and further has a feed ramp (140) formed in the region of a stop member (130) of the locking block (110) for feeding a cartridge, stored in a magazine of the handgun, into the cartridge chamber (121) following ejection of a fired cartridge. A modular design capable of being adapted to meet specific requirements is achieved in that the feed ramp (140) is formed on a ramp member (150) capable of being separated from the locking block (110) and releasably locked to the locking block (110).

Abstract: A cam pin system, includes a cam pin comprising a first cylindrical portion having a first length and a first diameter and a second cylindrical portion concentric with the first cylindrical portion and having a second diameter larger than the first diameter, the second cylindrical portion comprising a through-hole to accommodate the passage of a firing pin. The system includes an end plate detachably connected to the first cylindrical portion of the cam pin, a cylindrical bushing encircling the first cylindrical portion and having an outside diameter approximately equal to the second diameter and a bushing length approximately equal to the first length, and lubricant between the cylindrical bushing and the first cylindrical portion. The cam pin system is configured so that the cylindrical bushing can rotate freely about the first cylindrical portion.

Abstract: In a recoil-spring device (100) in a handgun equipped with a breech and a recoil spring (110) in the form of a spiral spring, whose rear end abuts a rear stop member (123) on a recoil spring rod (120) and whose front end is mounted for movement along the recoil-spring rod (120) with contraction of the recoil spring (110), support in an uncomplicated recoil-spring eyelet is achieved in that the front end of the recoil spring (110) abuts, at least indirectly, a rear contact surface (132) of a contact element (131) that is mounted for movement along said contact-spring rod (120), while the front contact surface (133) is in contact with an internal surface of the breech of the handgun.

Abstract: A semi-automatic or automatic rifle is provided the rifle having: a receiver having a hand guard portion; a barrel having a bore, the bore removably connected to the receiver, the hand guard portion surrounding at least a portion of the barrel; a gas block having a forward end and a rearward end aligned with the barrel; a sleeve removably secured to the forward end of the gas block; a piston slidably received within the gas block, wherein the gas block and the sleeve fluidly couple the piston to the bore of the barrel; wherein an increase in pressure in the bore of the barrel causes the piston to move away from the sleeve; and wherein the sleeve and the piston are each capable of being removed from the rifle through the forward end of the gas block without removing the gas block from the rifle.

Abstract: A bolt assembly for a rifle is configured for recoil blowback operation and cooperation with a round of ammunition dispensed from a magazine into a firing chamber of the rifle. An extractor disposed in a lower, forward portion of the bolt assembly and an ejector disposed in an upper, forward portion of the bolt assembly further cooperate with the round of ammunition to extract a spent cartridge of the round of ammunition from the firing chamber and eject the spent cartridge downward from the firing chamber.

Abstract: A semi-automatic or automatic rifle is provided. The semi-automatic or automatic rifle includes a receiver having an integral hand guard portion, a barrel having a bore. The bore is removably connected to the receiver, the hand guard portion extending over and surrounding the barrel, an indirect gas operating system has a gas block and a piston. The gas block has a cylinder, the gas block is fitted to the barrel, the cylinder is in communication with the bore. The piston has a piston end and a striking end, the piston end is fitted to the cylinder and has a bolt carrier having a striking surface. When a cartridge is fired, gas displaces the piston end and causes the striking end to strike the striking surface displacing the bolt assembly, wherein, the cylinder and the piston are together removable as an assembly from the firearm without disassembly of the rifle.

Abstract: A semi-automatic firing carbine anti-jamming cartridge loading system is provided wherein no feed lips or a portion of said feed lips are removed, wherein the cartridge to be loaded is fed to the carbine breech along a feed ramp. A bolt enclosing the firing pin includes a pivot plate mounted on the bolt nose, rotating about an axle. A recess formed in the bolt nose provides spacing for the pivot plate to rotate about said axle. If the firing pin protrudes through an aperture formed in the pivot plate, while the pivot plate is still in its collapsed state, then the weapon will jam by the firing pin hanging on the top part of a rim portion of the next loading round, thereby thwarting attempts at reconfiguring the weapon, that employs my novel system, to be re-converted as a fully-automatic weapon.

Abstract: An indirect gas operating system for an M4 type automatic or semi-automatic firearm. The indirect gas operating system has a gas block having a cylinder. The gas block is fitted to a barrel assembly having a bore with the cylinder in communication with the bore. A piston having a piston end and a striking end has the piston end fitted to the cylinder. A bolt assembly having a striking surface is provided. When a cartridge is fired, gas displaces the piston end and causes the striking end to strike the striking surface displacing the bolt assembly. The cylinder and the piston are together removable as an assembly from the firearm without removal of the gas block.

Abstract: The invention concerns a pistol with a housing (1), breech part (4) movable relative to housing (1), a barrel (5) arranged within breech part (4) and a trigger system (14, 15 16). The housing (1) according to the invention contains a receiver (2) and an upper housing part (3) designed in one part with it, which encloses the breech part (4) with the barrel (5) arranged in it.

Abstract: An improved Barrett anti-armor gun that is modified to function from the open bolt with advanced primer ignition, wherein the forward momentum of the recoiling masses at the moment of firing offset a significant portion of the recoil impulse from firing. The modification reduces the recoil energy absorbed by the shooter.

Abstract: An improved M1911-style handgun employs redistributed masses for a slide and bull barrel to reduce perceived recoil and muzzle flip when the gun is fired. The gun operates with cartridges having .50 caliber cases, bullets of .50 caliber or less, and 45 ACP-sized base rims, as well as with .45 ACP and smaller caliber cartridges. An improved magazine has crimped feed lips which feed rebated rim cartridges into any handgun or rifle without nose-diving, and a metal-reinforced follower which extends the operational life of the magazine.

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 recoil control mechanism for a weapon which fires a projectile which is characterized by the generation of a forward counterforce to the rearward recoil simultaneously with absorption of rearward recoil force upon initiation of propoulsion of the projectile. The forward counterforce is generated by propelling a first mass forwardly upon firing the projectile and substantially simultaneously propelling a second mass rewardly for absorbing some of the recoil force. In one mechanism (10), the first mass may be the weapon's barrel (12) and the second mass its breach block (14). Expaning gases (36) from detonation of propellant in cartridge (24) enter a reaction volume (28) between the barrel (12) and breech block (14). These gases drive barrel (12) forwardly against force transmission spring (16) to impose a forward counterforce on the weapon's frame (18).

Abstract: A contained Davis gun system enables misfire and hang-fire handling for fire out of battery (also known as soft recoil). The gun system decreases structural dynamic activity of the gun barrel during launch with resulting increases in system accuracy. The gun system further presents synergistic advantages when combined with a conventional recoil system in a double recoil design. The gun system includes a non-recoiling barrel and a recoil system engineered to contain a recoiling inertial breechblock capable of translating within the gun barrel. The recoil system includes a brake and a spring secured to a mount fixture. The breechblock enables the loading of the propellant and the projectile within the barrel, and further enables pressure to be contained within the barrel during firing. The recoil system applies a load to the breechblock, which is a function of the breechblock position and its velocity within the barrel.

Abstract: The closure of a blowback operated weapon is augmented by a gas cylinder and piston. The piston is self centering.

Abstract: A conversion kit for a recoil-operating automatic pistol to convert it to direct blow-back operation utilizes a two piece barrel having chamber and muzzle portions that may be threaded together. The chamber portion is first installed on the receiver by insertion through the injection port, and the muzzle-piece is then threaded to the chamber-piece to complete the assembly of the barrel.

Abstract: A gas-operated pistol which comprises a frame having a handgrip and adapted to receive a magazine. A slide is mounted for alternating longitudinal movement along the frame. A barrel is provided which is able to pivot at its muzzle end and rotate upwards from a locking engagement via locking means with the frame to allow a cartridge to be removed. An actuating means rotates the barrel upwards after the high pressure period has passed. A cylinder is located above the barrel and communicates with the barrel bore via a passage. The action of propellant gases in the cylinder on the piston urges the slide rearwards. This arrangement reduces the effect of felt recoil on the firer when using very powerful cartridges.

Abstract: A barrel for an automatic firearm which cycles on recoil action is provided with a transverse pin extending across the top of the rearward portion of the chamber. This pin nests within the extraction groove of a cartridge sing during firing. On cycling, the transverse pin deflects the spent case downwardly towards an ejector which effects ejection of the casing.

Abstract: A shoulder-launched multi-purpose assault weapon having a modified spotting ifle with a top-mounted electrically fired rocket launcher tube is provided. The spotting rifle forms the base structure of the weapon and all weapon controls are located on the rifle. The rifle has several dual-function mechanisms which perform the combined functions of assembly and safing, bolt-locking back and cartridge ejecting, simultaneous adjustment of both open and optical sights, firing, selectively, of both the spotting round and the electrically fired rocket round. The combination of these dual-firing mechanisms provides a lighter weight, better-balanced and smaller weapon. The reduction in parts count improves reliability and lowers cost. Other improved features include an adjustable spotting rifle barrel used to match the boresight of the rocket tube and an improved locking mechanism. A dual function trigger assembly operated two sears from a single trigger.

Abstract: A shoulder-launched multiple-purpose assault weapon having a modified spotter rifle with a top-mounted rocket launcher tube is provided. The spotter rifle forms the base structure of the weapon and all weapon controls are located on the spotter rifle. The spotter rifle has several dual-function mechanisms which perform the combined functions of assembly and safing, bolt-locking back and cartridge ejecting, simultaneous adjustment of both open and optical sights, firing, selectively, of both the spotter round and the rocket round. The combination of these dual-firing mechanisms provides a lighter weight, better-balanced and smaller weapon. The reduction in parts count improves reliability and lowers cost. Other improved features include an adjustable spotter rifle barrel used to match the boresight of the rocket tube and an improved locking mechanism. A dual function trigger assembly operated two sears from a single trigger.

Abstract: A breech bolt and lock assembly for a gas-operated firearm is provided. The ssembly is contained within a bolt housing which in turn contains a bolt operating spring and a two-part bolt mechanism. The two-part bolt has a cylindrical outer bolt which encloses the inner bolt and firing pin. A second spring operates the firing pin. During firing, the inertia of the firing pin and inner bolt prevents the sudden rearward movement of the discharging cartridge. There is no other locking of the breech, however, the weight of the inner bolt and pin assembly may be changed to accommodate different propellant loads.

Abstract: A weapon bolt assembly includes a bolt portion including a recess; a firing pin unit including a striker plunger axially slidably received in the recess and having an axially measured length and a firing pin attached to the striker plunger. The firing pin unit has a first position in which the firing pin projects from the bolt portion and a second position in which the firing pin is situated in its entirety within the bolt portion. A firing spring is disposed in the recess and has a relaxed state and a stressed state. In the relaxed state of the firing spring and in the first position of the firing pin unit a clearance is defined between the two components. In the stressed state the firing spring exerts a force on the firing pin unit urging it into its first position. The axially measured length of the firing pin unit is such that in the second position the firing spring remains in the relaxed state.

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 dual function semi automatic single shot rifle of simple, economical and durable construction is disclosed. A one piece receiver hollowed out for strength and weight reduction also acting as the rear stock houses a simple internal working mechanism, a sliding bolt carrier that is adjustable for various cartridge pressures, and also serving as a manual draw back action by tightening the operating spring adjustment screw. A single piece barrel of simple design is attached to the receiver at four location points, thus provided is a simple assembly with a minimum of internal working parts.

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: The invention relates to an improved semi-automatic target pistol. The improvements featured are: a tubular magazine that accommodates cartridges nose-to-tail fashion, and from which the cartridges are extracted singly and transferred to the bore by a pivoted cradle; a hammerless percussion system in which travel of the striker, housed internally of the breechblock, remains independent of breechblock travel; a set of percussion release levers set in motion by squeezing the trigger and energizing a solenoid, and a notably efficient lever mechanism for ejection of the spent cartridge.

Abstract: A semi-automatic pistol comprises a spring driven mobile striker assembly. t its rear the spring is coiled on a post and abuts an aft stationary plate. The striker assembly comprises an integral rear plate with a hole adapted for the penetration of the post and spring and having at the front side of the hole a hollow cylindrical sleeve adapted to accommodate the post and spring during recoil.

Abstract: A self-contained blowback-type firing unit insertable in a gun body as a discrete subassembly and including a barrel and bolt with a compression spring acting between them, characterized in that the barrel and bolt slide together on matching longitudinal track surfaces which are other than cylindrical and circumferentially complete, the bolt being slideable on no surfaces other than the barrel track surfaces.

Abstract: A unitary bolt face and firing pin device for firearms consisting of a self-adjusting head space block on the front of the bolt assembly facing the chamber in firing alignment with the primer of a cartridge inserted into said chamber, the face of said head space block having integrally formed thereon a firing pin for impacting with said cartridge primer when said bolt assembly is closed against said chamber.

Abstract: A firing mechanism for a semi-automatic rifle that provides a breech block and firing pin, each reciprocally movable simultaneously and independently in response to the firing of the rifle and the action of a pair of expansion springs positioned forwardly of and out of the firing chamber of the rifle.