Abstract: A rifle barrel for realigning a projectile which is propelled through the barrel by gas pressure, the barrel comprising: a bore having a bore diameter through which a projectile may travel; rifling ridges within the bore; and at least one bore expansion chamber in the bore, wherein a diameter of the at least one bore expansion chamber is greater than the bore diameter, wherein a length of the at least one expansion chamber is smaller than an overall length of the projectile and greater than a contact length of the projectile. A process for projecting a projectile from a rifle barrel, the process comprising: increasing gas pressure behind the projectile in the rifle barrel, whereby the projectile is propelled through the rifle barrel; and passing a burst of gas around the projectile, whereby the projectile is aligned coaxially in the rifle barrel.

Abstract: Barrels, a breech structured to interact with such barrel(s), and firearms incorporating such barrels and breech are disclosed. The barrels include a cartridge chamber having an internal surface with a curvature. They also include a guide element located adjacent to and extending away from the cartridge chamber. The guide element is located at a point where a transverse movement of a cartridge being loaded ends during a loading process. The guide element has a surface having a circular shape whose curvature corresponds to the curvature of the internal surface of the cartridge chamber.

Abstract: A tactical weapon includes a firearm assembly that is for firing ammunition. The firearm assembly has a stock member. The stock member is for facilitating supporting of the firearm assembly by a user. The stock member has a butt portion. The butt portion is coupled to a main portion of the stock member such that the butt portion is selectively positionable with respect to the main portion of the stock member. The butt portion is for permitting the user to position the firearm assembly around an object. A handle member is coupled to the firearm assembly. The handle member is selectably positionable with respect to the firearm assembly such that the handle member is for permitting the user to position the firearm assembly around the object.

Abstract: A firearm barrel includes an elongate metal insert member and a rigid sleeve surrounding the insert member along a majority of the length of the insert member. A casing is formed around at least a portion of the sleeve, preferably by injection molding. Breech and muzzle portions of the barrel may be fitted against the sleeve and are preferably tightly connected by the casing.

Abstract: A firearm assembly including a fluid deflector adapted to be connected to a discharge end of a barrel of a firearm, the fluid deflector including a first passage for flow therethrough of a fluid and a second passage in fluid communication with and angled with respect to the first passage for flow therethrough of the fluid.

Abstract: A barrel assembly (70) comprising a plurality of projectiles (75) axially disposed within a barrel (71) and associated with discrete selectively ignitable propellant charges (74) for propelling the projectiles from the barrel. The essence of the invention is the provision of a pressure relief valve, for example comprised by a port (73) and plug (76), associated with a chamber in which a propellant charge (74) is ignited. The pressure relief valve (73, 76) is designed to prevent catastrophic failure of the barrel (71) by exhausting via a chamber (72) in the event that the barrel is blocked by a projectile and detonation of one or more propellant charges (74) occurs.

Abstract: A method of denying access to a designated area (10) wherein said method includes monitoring designated area (10) to detect the presence of an intruder, and initiating an attack on said intruder wherein said attack includes discharging projectiles (15) from a barrel assembly (13). Barrel assembly (13) includes one or more barrels (16), a plurality of projectiles (15) axially disposed within each barrel (16) for operative sealing engagement with the bore of the barrel (16), and discrete propellant charges for propelling respective projectiles (15) sequentially through the muzzle of the barrel (16). The monitoring can be performed remotely from designated area (10) by sensing means (14), or on-site by way of sensors (11) distributed within designated area (10). The intruder can be military personnel such as one or more infantrymen, or a manned or unmanned vehicle such as an armoured car or tank.

Abstract: A paint ball gun is provided. The paint ball gun has a curved bore and a fluid actuated firing mechanism. The fluid actuated firing mechanism is in operable communication with the curved bore such that the fluid actuated firing mechanism propels the paint ball through the curved bore.

Abstract: A firearm cartridge has a case configured with a straight-walled portion and a radial shoulder for housing a propellant. The case further includes a neck for retaining a bullet. The straight-walled portion defines a base cavity having an interior base diameter. The interior base diameter is approximately twice or more the neck diameter. The diameter ratios of the base and neck optimize combustion efficiency to reduce heat and acceleration losses. The radial shoulder focuses a shockwave below a bullet base to reduce heat loss to the bullet and support bullet retention in the neck for a longer period of time. A thermally insulating coating is utilized to reduce heat loss to the case or chamber and accelerate ignition of the propellant.

Abstract: The elongated vented gun barrel may be used with a conventional firearm such as a shotgun or rifle. Strategically placed vents or ports may be placed along the length of the elongated gun barrel which function to slowly bleed off high pressure gasses within the elongated gun barrel following discharge of the firearm. The vents or ports facilitate the discharge of high pressure gasses at a controlled rate to reduce the report of a firearm. The gradual release of the high pressure gasses minimizes the shockwave following discharge from the conventional firearm.

Abstract: A firearm heat sink is provided that may be easily affixed to, and removed from, a firearm. The heat sink is provided with a plurality of cooling fins. In a preferred embodiment, the firearm heat sink is held in place by a cooperating collet and ring on each end of the heat sink. In an alternate embodiment, the firearm heat sink is formed in halves and is mechanically fastened together about the barrel of the firearm. In either embodiment, an underlying heat conducting material optionally may be added to insure a proper thermal path between the firearm and the heat sink.

Abstract: A reuseable war game device launches paint-balls or liquid colorant or both simultaneously, and can be aimed and fired while hand-held, can be concealed and aimed but remotely triggered, is easy to dismantle and repair under field conditions, is durable enough to withstand all field conditions, and is concealable, compact and easily portable. The device comprises a launch housing that includes a launch barrel joined to a rotatable muzzle assembly that is fixed on a target; a chamber housing that includes a charge chamber which receives and stores a charge; a hammer chamber that includes a retractable hammer that when released from a cocked position is thrust toward the charge chamber; a trigger that is drawn to retract the hammer to the cocked position; and, a check valve located between the launch barrel and the charge chamber that permits flow only from the charge chamber to the launch housing.

Abstract: A barrel assembly for a pneumatic paintball gun includes a barrel body and a barrel insert. The barrel body has a breech end, a muzzle end, and a barrel bore extending longitudinally through the barrel body from the breech end to the muzzle end. The barrel insert has a breech end, a distal end, and an insert bore, and is configured to be removably housed within a breech portion of the bore of the barrel body. The breech end of the barrel body is configured to attach to a breech end of the paintball gun. The barrel insert collaborates with the barrel body to provide a firing bore for the barrel assembly which guides a paintball fired from the breech end of the gun through the barrel and out the muzzle end of the barrel body. The barrel insert can be constructed having a thin, flexible wall so as to permit lateral deformation of the barrel insert.

Abstract: A firearm for discharging a high velocity projectile in which, to prevent injury to a firer from high pressure gases produced by an explosion in the fining chamber, a high pressure relief device is provided, which in normal use remains intact and permits normal firing of the projectile but in the event of an explosion in the firing chamber, high pressure gases which are produced rupture the high pressure relief device and vent the high pressure gases, in a direction away from the firer.

Abstract: An improved gun barrel for use in combination with an air gun body for firing soft walled projectiles having a substantially fluid interior such as paintballs. The barrel features a plurality of longitudinal grooves operatively positioned on the interior wall of the axial chamber of the barrel to cooperatively engage portions the sidewall of the deformed soft projectile traveling therethrough. The soft projectile, such as a paint ball, is thereby prevented from rotating due to contact multiple contacts within the slots in the wall surface of the axial chamber and exits the barrel substantially void of any spin. Additional utility is provided by a scavenger located on the distal end of the barrel communicating through the barrel wall to the axial chamber to thereby vent compressed gas creating eddies behind a soft projectile during exit from the barrel.

Abstract: An improved gun barrel for use in combination with an air gun body for firing soft walled projectiles having a substantially fluid interior such as paintballs. The barrel features a plurality of longitudinal grooves operatively positioned on the interior wall of the axial chamber of the barrel to cooperatively engage portions the sidewall of the deformed soft projectile traveling therethrough. The soft projectile, such as a paint ball, is thereby prevented from rotating due to contact multiple contacts within the slots in the wall surface of the axial chamber and exits the barrel substantially void of any spin. Additional utility is provided by a scavenger located on the distal end of the barrel communicating through the barrel wall to the axial chamber to thereby vent compressed gas creating eddies behind a soft projectile during exit from the barrel.

Abstract: A muzzleloading shotgun has a barrel with a constant inside diameter that flares outwardly a short distance from the muzzle to a constant diameter. The muzzle end of the barrel has exterior threads which receive the interior threads of a choke. The choke has an internal diameter that tapers inwardly as it progresses from the end of the barrel to the end of the choke. The flared portion of the shotgun barrel allows the shot pattern to expand as it approaches the discharge end of the barrel. The shot within the constant diameter portion of the barrel becomes condensed as it moves outwardly through the choke to achieve the desired concentrated shot pattern. Because the choke is tapered from the enlarged diameter created by the flared portion of the barrel, to a narrower portion at the discharge end thereof, the effective internal diameter of the choke at its discharge end is still large enough to permit the shotgun to be reloaded through that end without the removal of the choke from the shotgun barrel.

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 barrel assembly for a pneumatic paintball gun includes a barrel body and a barrel insert. The barrel body has a breech end, a muzzle end, and a barrel bore extending longitudinally through the barrel body from the breech end to the muzzle end. The barrel insert has a breech end, a distal end, and an insert bore, and is configured to be removably housed within a breech portion of the bore of the barrel body. The breech end of the barrel body is configured to attach to a breech end of the paintball gun. The barrel insert collaborates with the barrel body to provide a firing bore for the barrel assembly which guides a paintball fired from the breech end of the gun through the barrel and out the muzzle end of the barrel body. The barrel insert can be constricted having a thin, flexible wall so as to permit lateral deformation of the barrel insert.

Abstract: A semi-automatic handgun is disclosed including a frame having a barrel housing mounted thereon. A barrel is movably mounted on the barrel housing and has a cartridge chamber at its rearward end for receiving a cartridge therein. The barrel is movable between a rearward position and a forward position with respect to the barrel housing and is normally in its rearward position. The barrel moves forwardly in a straight line from its rearward position upon firing of the cartridge in the chamber to counteract the rearward energy of discharge, thereby reducing recoil. The handgun may be fired in either a single action or double action manner. The firing hammer of the handgun is re-cocked, upon firing of the cartridge, by means of a movable piston having a firing pin positioned therein with the firing pin engaging the hammer to move the hammer to its re-cocked position.

Abstract: A paint ball gun is provided. The paint ball gun has a curved bore and a fluid actuated firing mechanism. The fluid actuated firing mechanism is in operable communication with the curved bore such that the fluid actuated firing mechanism propels the paint ball through the curved bore.

Abstract: A shotgun having identification grooves within at least part of the barrel, in a unique pattern which corresponds to the a recorded serial number of the shotgun (or of the barrel). The grooves are dimensioned to mark the polymer wadding which is normally included in a shotshell. The ejected wadding is thereby marked with identification data which can be used later to identify the gun.

Abstract: A gun having a firing mechanism and a barrel. The barrel has a breech end coupled to the firing mechanism, a muzzle end, and a bore having a length which extends longitudinally between said breech and muzzle ends. The length of the bore between the breech and muzzle ends is curved.

Abstract: A gun having a slightly curved bore for discharging a frangible generally spherical projectile creating an improvement in trajectory of the projectile. The slightly curved bore applies a spin onto the spherical projectile without causing the projectile to rupture.

Abstract: A firearm in which a mechanical identification is integral with the surface of the chamber. Preferably the identification markings are elongated (ridges or grooves) in the direction of spent casing extraction. The extracted casings are thereby marked with a unique weapon identification number, which can easily be read by standard forensics methods.

Abstract: A projectile guide for a compressed gas powered gun which includes a hollow cylindrical sleeve-like base with an axially extending projectile guiding cylindrical opening therethrough. The base has at one end thereof and extending axially from this one end a plurality of elongate and circumferentially spaced members of finite length and configured relative to each other to define a projectile guiding passageway for a projectile fired from the gun.

Abstract: The invention relates to ammunition suitable for firing from a self-loading sidearm comprising a cartridge adapted to fire a projectile, the cartridge case having at one end a portion of reduced diameter, the projectile being held in the said portion of reduced diameter, wherein the ratio of the external diameter of the cartridge case at its widest point to the external diameter of the projectile at its widest point is such that when the projectile is fired into a target high velocity wounding is caused. The invention also relates to a gun barrel for a self-loading sidearm through which the ammunition can be shot, and a self-loading sidearm comprising such a barrel.

Abstract: A smooth bore rifle barrel (10) comprising an initial portion or cartridge chamber (11), an intermediate portion or bore (12), a final portion, composed of a muzzle section (15, 16) and a terminal portion (13, 14) with a fixed choke or built in a manner to provide a series of interchangeable chokes. The muzzle section (15, 16) is provided with a conical fitting (15) connected to a portion (16) of the barrel (10) of a cylindrical shape, so as to attain, at a predetermined ratio between the lengths and diameters of the conical fitting (15) and of the cylindrical portion (16), a reduction of the recoiling force with respect to that of known rifle barrels, without changing the exit velocity and spreading angle of the gunshot.

Abstract: A composite tube for a gun barrel consists of: an inner tubular metal liner defining a longitudinal bore axis; a resin matrix material surrounding the liner, the resin matrix material containing a plurality of elongate carbon fibers, the carbon fibers being aligned parallel with the longitudinal bore axis of the liner and under compression along the longitudinal bore axis; a muzzle piece attached to the muzzle end of the barrel; and a breech piece attached to the breech end of the barrel, so that any vibrations transmitted along the longitudinal bore axis of the liner are absorbed by the resin matrix material and so that any vibrations reaching the muzzle piece and breech piece are reflected back into the resin matrix material and thus absorbed.

Abstract: A method for refinishing the bore of a shotgun barrel achieves high finish surface grades by pumping a relatively soft abrasive media longitudinally through the bore. The resulting bore striations are oriented in a longitudinal direction along the barrel, significantly reducing the felt recoil and increasing the muzzle velocity of the weapon. The gunsmith swabs the bore to remove dust. The bore is inspected to detect obstructions and blemishes and then secured to a support structure in a horizontal orientation. The grade of the surface finish of the bore is determined. A polishing media pumping system is connected to the receiver end of the barrel and all holes through the barrel wall are blocked. A silicone matrix media impregnated with silicon carbide is pumped from the receiver end of the barrel through the bore and out the muzzle end of the barrel to polish the bore until the bore striations are generally longitudinal.

Abstract: The subject of the invention is a fastening device for a muzzle mirror at one end of an artillery gun barrel, device comprising a mirror support incorporating at least two flanges encircling the gun barrel and connected to one another by a first linking means. In this device the flanges are housed in a groove made in the barrel and are linked in rotation to said barrel by means of an obstacle, such as a pin, such device also comprising a centering collar constituted by at least two jaws connected by a second linking means, such collar having a tapered support co-operating with a matching tapered support arranged on the flanges such that tightening the second linking means ensures both the axial and radial retention of the flanges.

Abstract: A weapon system includes a gun barrel and a vibration absorber fitted onto a free end of the gun barrel. The vibration absorber includes a compliant energy storage device, such as a spring, and a mass secured to the energy storage device. The potential energy stored in the spring and the kinetic energy stored in the mass inertia are dissipated in part as friction, and re-introduced in part to the gun barrel such that the re-introduced energy is out of phase relative to the gun barrel motion. As a result, the vibration absorber does not totally dissipate the stored energy, but rather reshapes the receptance of the gun system so as to significantly reduce the vibration energy that migrates into the gun structure from known disturbances. This improves the overall accuracy of the gun system. In addition, the vibration absorber reduces the load between the gun barrel and the projectile during launch, thereby reducing the gun barrel muzzle wear and the exit yaw rate of the projectile.