Abstract: A flash hider is configured to reduce a firearm's visible signature. The flash hider extends along a central axis from a proximal end to a distal end. The proximal end defines a central opening to an expanding central volume of a first flash hider portion. One or more outer volumes are located radially outside of the central volume and can be part of first and/or second flash hider portions. When the outer volumes are part of the first flash hider portion, the outer volumes can communicate with the central volume. Optionally, a second flash hider portion includes one or more gas passageways located radially outside of the central volume. For example, gas passageways are interspersed circumferentially with outer volumes of the first flash hider portion, where the gas passageways are isolated from first flash hider portion and receive gas flows via vent openings in the outer wall.

Abstract: A flexible fit, easy to attach and align, firearm adapter that allows secure fitment of a muzzle device, such as a suppressor, to a broad range of firearm sizes and shapes, with a single device. These firearms would include difficult to fit barrel profiles that in many cases would go unsuppressed without this improvement over the prior art. An embodiment includes an anchor securable to a smooth section of a firearm barrel and a housing adapted to engage the anchor. The anchor and housing are sized to reach over or around barrel obstructions. An embodiment includes an alignment guide to bring the barrel into axial alignment with the muzzle device.

Abstract: A fast-attaching, self-aligning, easily adaptable firearm adapter. The novel adapter attaches to the barrel of a firearm while precisely aligning the barrel and adapter using a concentric constriction sleeve along the barrel and a barrel guide to funnel firearm muzzle. The device is adapted to attach to a wide range of barrel diameters via an easy to fit and inexpensive to manufacture fitment sleeve. Thus, the adapter can be manufactured in a single size and work with most firearms. In addition, the device attaches to the smooth section of barrel thereby eliminating the need for permanently modifying a firearm by threading the barrel.

Abstract: A fast-attaching, self-aligning, easily adaptable and preferably tool-less suppressor adapter. The novel adapter attaches to the barrel of a firearm while precisely aligning the barrel and adapter using a set of compression feet equidistantly spaced around the perimeter of the adapter. The device is adapted to attach to a wide range of barrel diameters via an easy to fit and inexpensive to manufacture fitment sleeve. Thus, the adapter can be manufactured in a single size and work with most firearms. In addition, the device attaches to the smooth section of barrel thereby eliminating the need for permanently modifying a firearm by threading the barrel.

Abstract: A fast-attaching, self-aligning, easily adaptable and tool-less firearm adapter. The novel adapter attaches to the barrel of a firearm while precisely aligning the barrel and adapter using a concentric constriction sleeve along the barrel and a longitudinal compression barrel guide at the muzzle. The device is adapted to attach to a wide range of barrel diameters via an easy to fit and inexpensive to manufacture fitment sleeve. Thus, the adapter can be manufactured in a single size and work with most firearms. In addition, the device attaches to the smooth section of barrel thereby eliminating the need for permanently modifying a firearm by threading the barrel.

Abstract: A semiautomatic pistol having a barrel with an exterior surface that has a plurality of indentations and dimples to dissipate heat and reduce frictional engagement between the barrel and the slide. The barrel component includes a crown portion that is recessed to protect the crown portion by a pocket.

Abstract: A firearm sound suppressor (12) has a baffle tube (20) and an exterior tube (14) which are concentrically disposed to define a single expansion chamber (56) there-between. A muzzle cap (16) encloses a first end of the expansion chamber (56) and has a plurality of flow ports (36) which provide fluid communication between a gun barrel muzzle and the expansion chamber (56). An end cap (18) encloses a second end of the expansion chamber (56). The end cap (18) has a bullet port (46) and vent ports (48) which extend circumferentially around the bullet port (46). Baffles (22) of tubular shape are pressed into the baffle tube (20) to provide a baffle stack (66). The baffles (22) have interiorly disposed upsets (78) which defines a gas check feature, causing spent propellant gases move into the entire volume of the expansion chamber (56) to reduce muzzle blast pressures.

Abstract: A firearm barrel alignment device and method of use for quickly and accurately axially aligning an adapter with the barrel of a firearm. The novel barrel alignment device attaches to or is integrated with an adapter and includes an angled or inwardly curved funnel to guide the muzzle of a firearm barrel. The firearm barrel alignment device is heat resistant, preferably, in excess of 1300 degrees Fahrenheit. Moreover, the funnel in the firearm barrel alignment device is adapted to create a seal between the muzzle and the firearm barrel alignment device.

Abstract: A suppressor assembly for use with a firearm is disclosed herein. The suppressor having: a baffle; a rear seal plate; a housing; and a front end cap, wherein the housing, the rear seal plate and the front end cap define an expansion chamber for receipt of expansion gases received from the baffle.

Abstract: A blank-only machine non-firearm includes a replica shell and replica barrel from a non-firing replica machinegun, such as an airsoft replica machinegun. An insert that defines a receiver may be inserted into and contained within the interior volume of the replica shell. An exhaust gas barrel is attached to the receiver and extends within the replica barrel. The replica receiver and barrel are configured to fire blank cartridges and not to fire live rounds. Noise and flash from a firing blank cartridge is directed from a chamber defined by the receiver to the exhaust gas barrel and hence to the replica barrel.

Abstract: A fast-attaching, self-aligning, easily adaptable and preferably tool-less suppressor adapter. The novel adapter attaches to the barrel of a firearm while precisely aligning the barrel and adapter using a set of compression feet equidistantly spaced around the perimeter of the adapter. The device is adapted to attach to a wide range of barrel diameters via an easy to fit and inexpensive to manufacture fitment sleeve. Thus, the adapter can be manufactured in a single size and work with most firearms. In addition, the device attaches to the smooth section of barrel thereby eliminating the need for permanently modifying a firearm by threading the barrel.

Abstract: According to one embodiment of the disclosure, a simulated firearm is provided that mimics the appearance of an actual firearm and is configured to fire blank ammunition. The simulated firearm also includes a light transmitter that transmits an infrared signal representative of a bullet fired from the actual firearm in response to firing of the blank ammunition.

Abstract: A blank handling device is provided for receiving and firing a blank cartridge for use in a non-gun. The handling device includes a housing having a blank receiving chamber sized and configured for holding the blank during firing. The blank receiving chamber includes a first axis and a first diameter. A gas discharging passageway capable of being coupled to a barrel of a non-gun, is provided that has a second axis and a second diameter. A gas flow passageway is fluidly coupled to and extends between the blank receiving chamber and the gas flow passageway for conducting gasses discharged by the firing of the blank cartridge between the blank receiving chamber and the gas discharging passageway. The gas flow passageway has a third axis and a third diameter. The third diameter is less than the first diameter for preventing the passage through the gas flow passageway of a projectile discharged in the blank receiving chamber.

Abstract: A firearm recoil modifying device includes a cylindrical body having a rearward end, a forward end, and a longitudinal axis extending therebetween. An adapter having a central aperture aligned with the longitudinal axis is coupled to the rearward end of the cylindrical body. An end cap is coupled to the forward end of the cylindrical body, and includes a central aperture aligned with the central aperture of the adapter along the longitudinal axis. A piston is carried within the interior volume of the cylindrical body for reciprocal movement between a rearward position and a forward position. The piston includes a central aperture aligned with the central apertures of the adapter and the end cap, along the longitudinal axis. A biasing member biases the piston into the rearward position.

Abstract: In one embodiment, a blank safety device is provided that includes: a body defining a cylindrical bore having a closed distal end, the body also defining an proximally extending internal cavity in communication with the cylindrical bore; a bullet plug received within the cylindrical bore, the bullet plug being configured to distally displace within the cylindrical bore towards the closed distal end in response to the impact of a fired bullet; and a back section received within the internal cavity in the body, the back section defining an internal chamber that is sealed with respect to a proximal bore for receiving a firearm attachment.

Abstract: A bullet trap (1) is provided that connects to a muzzle end (5) of a weapon (3). The bullet trap (1) has a body (11) with a chamber (17) into which a bullet can be fired. The chamber (17) has a plurality of baffles (27) located one behind the other in an aligned series arrangement. The baffles (27) absorb kinetic energy of a fired bullet and enable the bullet to be trapped within the body (11). The baffles (27) have a thickness at a center of axis of travel of a bullet less than the thickness at a radially outwardly distant position to provide for a deformation at the center of a first of a series of baffles (27) before there will be engagement of a center of second and subsequent baffles (27).

Abstract: A booster system including a piston housing, a piston, a spring, and a rear cap attached to the piston housing. The piston housing includes an annular outer wall and an annular projection extending inward from the outer wall at a rear end of the piston housing. The piston is disposed within the piston housing and includes a bore and a radially outwardly extending flange at its front end. The spring is radially disposed between the piston housing and the piston in a space enclosed by the outwardly extending flange and the annular projection. The rear cap includes an end wall extending radially outward from a rear end of the piston housing. A side wall extends forward from the end wall and hangs over the outer wall of the piston housing at a radial distance from the outer wall of the piston housing. The sidewall of the rear cap includes an engagement surface for attachment to a body of a silencer.

Abstract: Various techniques are provided for firing blanks from firearms. In one example, a blank firing adapter includes a mount assembly operatively configured to be attached to a muzzle of a firearm. The blank firing adapter also includes a main body having an interior chamber. The blank firing adapter also includes an escape port positioned longitudinally forward of the interior chamber and not in communication therewith. The blank firing adapter also includes a barrier interposed between the escape port and the interior chamber. The blank firing adapter also includes a projectile receiving area positioned longitudinally forward of the escape port and configured to slow down a projectile from the muzzle therethrough.

Abstract: An adjustable muzzle brake in which an interior volume of the muzzle chamber can be varied without the use of tools which allows shooters to adjust the flow of the propellant gases and thereby allow shooters to determine and select the optimum recoil for their shooting preference.

Abstract: A firearm attachable bullet trap for use on a gas operated firearm having a compensator attached to the barrel. The bullet trap captures bullets from live rounds and provides an visual and tactile indication of live rounds having been fired. The bullet trap is designed for the shooting of blank rounds, but is adapted to handle live rounds having a bullet in a semi-automatic or automatic firearm.

Abstract: An blank firing attachment, with enhanced operating life, for use with gas-operated weapons; wherein, a tungsten carbide stem extending from the attachment is inserted into the bore of the weapon's barrel, the stem having a cross-sectional area less than the cross-sectional area of the bore, to provide backpressure within the barrel to properly cycle the weapon.

Abstract: A booster system including a piston housing, a piston, a spring, and a rear cap attached to the piston housing. The piston housing includes an annular outer wall and an annular projection extending inward from the outer wall at a rear end of the piston housing. The piston is disposed within the piston housing and includes a bore and a radially outwardly extending flange at its front end. The spring is radially disposed between the piston housing and the piston in a space enclosed by the outwardly extending flange and the annular projection. The rear cap includes an end wall extending radially outward from a rear end of the piston housing. A side wall extends forward from the end wall and hangs over the outer wall of the piston housing at a radial distance from the outer wall of the piston housing. The sidewall of the rear cap includes an engagement surface for attachment to a body of a silencer.

Abstract: A firing adapter for a combination gas and recoil operated weapon includes a blank firing barrel attached to the weapon; a piston having a barrel end and an anchor end, the barrel end being reciprocably disposed in the blank firing barrel and the anchor end being fixed to a non-recoil surface; and a gas port formed in the blank firing barrel wherein in a rest position of the weapon, the barrel end of the piston closes the gas port, and in a recoil position of the weapon, the barrel end of the piston opens the gas port.

Abstract: Blank cartridge devices for attachment over a muzzle flash suppressor and methods of operating the same are disclosed. A disclosed example includes a muzzle flash suppressor mounted on a barrel that includes a muzzle, a longitudinal bore including internal threading, an inner cone in communication with the longitudinal bore, and a lateral opening located in a side of the muzzle flash suppressor between the inner cone and the muzzle of the muzzle flash suppressor. A disclosed example further includes a blank cartridge device that includes a tube, a cover and a stop block. The tube is sized to penetrate the longitudinal bore of the muzzle flash suppressor, and the tube has external threading to threadingly engage the internal threading in the longitudinal bore of the muzzle flash suppressor. The tube also includes an outer cone to form a seal with the inner cone of the muzzle flash suppressor. The tube further defines a core bore that is in communication with the bore of the barrel.

Abstract: A gun barrel having a muzzle brake (2), especially for large-caliber guns, in which the muzzle brake (2) includes a tubular piece that has openings (16) around its circumference, and a jacket tube (4), which surrounds the tubular piece and has diametrically opposite gas-exit openings (17) that extend perpendicular to the bore longitudinal axis (15). To provide an arrangement comprising a barrel (1) and a muzzle brake (2) that minimizes the firing stresses on the parts of the muzzle brake (2) that are detachably connected to the barrel (1), the muzzle region (3) of the barrel (1) itself is used as a component of the muzzle brake (2. That is, the muzzle region of the barrel is provided with a plurality of openings (16) arranged in ring formation around the barrel (1), and the attached the jacket tube (4) is provided with slot-shaped gas-exit openings (17) over this muzzle region (3).

Abstract: A blank cartridge device is disclosed. According to one example, the blank cartridge device includes a frame, a threaded bush, a nozzle body, and a cover bushing. In such an arrangement, the frame may include first and second longitudinal sides and front and rear sides, wherein the rear side includes a laterally open recess, and wherein the frame is laterally deferrable on a muzzle flash eliminator of an automatic firearm. The nozzle body may include a male thread on the outer periphery of the nozzle body and may be adapted to be screwed into the threaded bush and to extend into the muzzle flash eliminator.

Abstract: The invention relates to a training cartridge for an automatic rapid-fire weapon. Said training cartridge (1) has a central channel (4) running therethrough which accommodates a propellant charge (6) in the rear area of the cartridge (1) and is closed at the rear by a detonator charge (7) for the propellant charge (6). The training cartridge and weapon barrel are configured in such a way that no live ammunition can be fired from said weapon barrel. The channel which is open at the cartridge tip is preferably used during the firing of the training cartridge to receive a mandrel (28) of a gas choke (22) which is mounted in the weapon barrel (21). The propulsion gases which escape through the opening (8) at the cartridge tip propel the training cartridge backwards towards the weapon bolt and expel said cartridge from said bolt of the rapid-fire weapon. The bolt is simultaneously primed for the next shot.

Abstract: A blank firing barrel for use with handguns is disclosed. The blank firing barrel is sized to be substituted for an existing live-ammunition firing barrel in a handgun. The blank firing barrel can be machined from a solid block of metal such as stainless steel so that the barrel end is a contiguous portion of the original solid metal block. A downwardly angled small pressure release hole can be drilled into the closed end so that gasses from firing the blank can be safely discharged. The open end of the blank firing barrel can be sized to only accept ammunition being smaller in diameter than regular ammunition that is used for the handgun. The under rear edges of the blank firing barrel can be angled so that said barrel safely recoils within the handgun when it is fired.

Abstract: A noise abatement apparatus for a gun having a gun tube includes a plurality of generally spherical pressure vessels, with a first pressure vessel having an end adapted to be coupled to the gun tube. The pressure vessels are adapted for attenuating pressure waves caused by a firing of a projectile by the gun and for being mounted on a surface. At least two of the pressure vessels are in general alignment with one another. The apparatus may further include at least one connecting portion, a catcher for entrapping particulates and for permitting the projectile to pass, and at least one orifice plate or baffle for aiding in attenuating the sound. A noise abatement system includes the apparatus and a platform on which the apparatus is mounted. The system may further include an actuator for moving the apparatus along a track that is in physical communication with the platform.

Abstract: Blank for a gun barrel, consisting of a steel bar, which bar, in one or more hot working steps, has been repeatedly wrung about its own longitudinal axis.

Abstract: A porous barrel, projectile passageway, or tube as a type of supersonic nozzle for projectile propulsion therein and method for optimizing projectile velocity therethrough. The porous barrel features a barrel wall containing holes, passageways, or otherwise porous material through the barrel wall that allows gas, fluid, or other matter to exit or move in a direction away from the barrel interior. The flow of gas, fluid, or other matter away from the barrel interior allows gas within the barrel to expand in a direction transverse to the projectile path. The amount of transverse expansion of the gas in the barrel interior can be controlled by the porosity of the barrel wall to cause any desired amount of gas expansion. Transverse expansion allows axial gas velocities within the barrel to exceed the local speed of sound as if the gas had passed through a converging diverging nozzle.

Abstract: A low impulse firing attachment and companion ammunition for combination gas and recoil operated automatic weapons is comprised of a barrel insert and piston that provide the mechanism for containing the expanding propellant gases produced on firing. Such mechanism provides the required gas pressure at the gas port of the weapon to power the gas system. The barrel insert also allows the use of a sub-caliber piston for the propellant gases to act against. The gas pressure forces the barrel and piston apart, accelerating the recoiling mass rearward to provide recoil operation. The sub-caliber piston allows the use of the relatively high gas port pressure while limiting the peak force transmitted through the adapter. The blank and adapter provide the appropriate gas pressure at the gas port to power the gas system. The adapter also acts as a piston inside the barrel so that the gas pressure forces the barrel rearward, which provides the recoil operation.

Abstract: A blank firing attachment for a recoil operated gun. The attachment comprises a barrel (10) having in its length an external shoulder (12). A gas cylinder in the form of a sleeve (13) is slidingly fitted onto the barrel (10) and located over the external shoulder (12). An internal shoulder (14) of the sleeve is located opposite the external shoulder (12) such that the shoulders (12 and 14) together with the surface of the barrel (10) and the sleeve (13) form a gas chamber (24). At least one gas transfer passage (11) connects the gas chamber (24) to the bore (10′) of the barrel (10). A mounting flange (15) with fastenings (19) and locking lugs (20) fix the gas cylinder (13) to a receiver section (23) of a gun.

Abstract: The invention provides a device for reducing the danger of harm caused by the accidental discharge of a bullet from a firearm, including an attachment for engaging the muzzle end of a firearm barrel; a substantially tubular body having a cavity and coaxially attachable at one of its ends to the barrel via the attachment; an impact disc having upper and lower surfaces, slidably disposed in the cavity of the tubular body; an energy-absorbing and storing element interposed in the tubular body between the upper surface of the impact disc and an abutting member, the absorbing and storing element acting on the impact disc to maintain contact with the abutting member inside the body, and a body made of a material at least as hard as the material of the bullets to be used with the fiream, the body being affixed at the lower surface of the impact disc, for substantially preventing a bullet from piercing through the impact disc; whereby, upon the discharge of a bullet, the bullet impacts the body, transferring some of

Abstract: The bolt of a blowback operated weapon is driven rearward by multiplying the area acted upon by pressurized gas generated by a subcaliber bulleted cartridge or a blank cartridge fired in a subcaliber barrel inserted into the weapon barrel and attached to the weapon barrel muzzle.

Abstract: A device for preventing the accidental discharge of a bullet from a firearm, suitable for use with blank cartridges, the device including an attachment member adapted to engage the muzzle end of a firearm barrel, a substantially tubular body having a cavity and coaxially attachable at one of its ends to the barrel via the attachment member, a bullet-pierceable insert having a portion traversing the axis of the barrel and tubular body, an impact disk slidably disposed in the cavity of the tubular body, and an energy-absorbing and storing unit interposed in the tubular body between the impact disk and an abutting element, acting on the impact disk to maintain contact with the insert inside the body, wherein, upon the discharge of a bullet, the bullet pierces the insert and hits the impact disk, transferring some of its kinetic energy to the energy-absorbing and storing unit and is thereby prevented from being discharged from the firearm.