A specialized underwater pistol with ammunition includes one or more of barrel expansions to shape the pattern of the plural shot pieces expelled from a pistol cartridge when the pistol is fired, an aerodynamic trigger cam or spur, flushing ports, a wide trigger pull, a wide hammer spur, a cartridge shot carrier with a frangible end, and cartridge sealant.

The installation space dimensions of a weapon system in the tower are complied with, and a loading space diameter of a caliber-larger weapon barrel is approximately maintained in relation to the smaller caliber. The required larger loading space volume for the caliber increase is predominantly achieved by an extension of the loading space of the caliber-larger weapon barrel relative to a loading space of the caliber-smaller weapon barrel itself. Since the loading space diameter of a larger caliber remains virtually unchanged, the outer dimensions of the caliber-larger weapon barrel also remain virtually unchanged compared to the outer dimensions of the caliber-smaller weapon barrel in the region of the loading part.

A projectile extending along an axis X between two ends, the projectile being positioned in a barrel of substantially cylindrical shape of axis X is provided. The projectile comprises: a hollow part at its center, opening onto a first of the two ends of the projectile to receive a compressed fluid, a plurality of vents passing through the projectile from the hollow part substantially perpendicular to the axis X and with a substantially radial outlet to expel the compressed fluid substantially at a tangent to the projectile. The invention also relates to the barrel and to a launch device comprising a projectile and a barrel.

A projectile extending along an axis X between two ends, the projectile being positioned in a barrel of substantially cylindrical shape of axis X is provided. The projectile comprises: a hollow part at its center, opening onto a first of the two ends of the projectile to receive a compressed fluid, a plurality of vents passing through the projectile from the hollow part substantially perpendicular to the axis X and with a substantially radial outlet to expel the compressed fluid substantially at a tangent to the projectile. The invention also relates to the barrel and to a launch device comprising a projectile and a barrel.

A sight adjustment device, which adjusts a course of a bullet to be shot when shooting the bullet loaded in a cartridge portion of each of barrels, in a simulation gun having a plurality of the barrels includes a plurality of pressurization members that add pressure to the bullet loaded in each cartridge portion such that rotation is applied to each bullet; link members that are provided on a side of a gun main body such that one end portion is disposed on a side of the pressurization members and the other end portion is disposed on a side of operation units, and transmit operations of the operation units to the pressurization members; and the operation units that are provided on the side of the gun main body in order to adjust a backspin amount.

A method of modifying a firearm barrel comprising the steps of milling an existing barrel to create a sloped area with a larger diameter at a chamber end and a small action moving toward the muzzle end; placing an barrel nut on the barrel; placing a chamber bushing having a step with the step disposed at the chamber end; placing a brass pressing guide on the barrel and placing the barrel assemble with brass press guide and rear jacket tube in a press to press fit these components together; placing a gas block on the barrel adjacent to the rear jacket tube pressing the components tougher using the press; placing a front jacket tube on the barrel adjacent to the gas block and pressing the components tougher using the press; covering the threads of the barrel and placing a pour guide on the barrel; filling a void defined between the front jacket tube, rear jacket tube and barrel with a filler; placing a centering device on the barrel so that it is operatively associated with the front jacket tube to center the barrel in the front jacket tube while the filler is curing; placing a muzzle brake cap on the barrel and pressing the muzzle cap into the front jacket tube using the press; and, attacking a muzzle brake.

A method of modifying a firearm barrel comprising the steps of milling an existing barrel to create a sloped area with a larger diameter at a chamber end and a small action moving toward the muzzle end; placing an barrel nut on the barrel; placing a chamber bushing having a step with the step disposed at the chamber end; placing a brass pressing guide on the barrel and placing the barrel assemble with brass press guide and rear jacket tube in a press to press fit these components together; placing a gas block on the barrel adjacent to the rear jacket tube pressing the components tougher using the press; placing a front jacket tube on the barrel adjacent to the gas block and pressing the components tougher using the press; covering the threads of the barrel and placing a pour guide on the barrel; filling a void defined between the front jacket tube, rear jacket tube and barrel with a filler; placing a centering device on the barrel so that it is operatively associated with the front jacket tube to center the barrel in the front jacket tube while the filler is curing; placing a muzzle brake cap on the barrel and pressing the muzzle cap into the front jacket tube using the press; and, attacking a muzzle brake.

A method and apparatus for producing gun barrels having a grooved or ribbed inner surface with straight or helical grooves or ribs, by providing a metallic hollow cylindrical pre-form, placing the pre-form on a core mandrel being part of a flow forming machine having a main machine axis, the core mandrel having a structured outer surface comprising ribs and/or grooves extending straightly parallel to and/or helically around the main axis; and applying forming rollers, in a roller arrangement, to the outside surface of the pre-form so as to apply radial pressure on the pre-form such that its material begins to flow. As the rollers apply force upon the pre-form, a relative motion between the pre-form and the rollers is performed by moving the pre-form in axially parallel to the main axis through the roller arrangement or by moving the roller arrangement alongside the pre-form.

Embodiments of the invention include a firearm system and method of assembly of the firearm system including a receiver complex including a receiver coupled to a forward receiver. A feed port is positioned between the receiver and the forward receiver, and a striker coil assembly is positioned proximate the receiver, and includes a plurality of strikers each extending at least partially through a coil. An interchangeable barrel is coupled to the forward receiver forming a breech. In some embodiments, the firearm system includes a breech that includes a plurality of side-by-side bores of the barrel. Some embodiments include a magazine coupled to the receiver complex adjacent the feedport to simultaneously feed more than one dischargeable projectile into the feedport with a single charge block. In some embodiments, the charge block includes a plurality of chambers and a plurality of projectiles positioned within the plurality of chambers.

Embodiments of the invention include a firearm system and method of assembly of the firearm system including a receiver complex including a receiver coupled to a forward receiver. A feed port is positioned between the receiver and the forward receiver, and a striker coil assembly is positioned proximate the receiver, and includes a plurality of strikers each extending at least partially through a coil. An interchangeable barrel is coupled to the forward receiver forming a breech. In some embodiments, the firearm system includes a breech that includes a plurality of side-by-side bores of the barrel. Some embodiments include a magazine coupled to the receiver complex adjacent the feedport to simultaneously feed more than one dischargeable projectile into the feedport with a single charge block. In some embodiments, the charge block includes a plurality of chambers and a plurality of projectiles positioned within the plurality of chambers.