Methods of manufacturing metal, metal-matrix, metal-metal-matrix composite weapon barrels offer barrels with improved thermal performance and rigidity with no, minimal or negative weight increase. A barrel may include a barrel core surrounded by a lightweight, thermally conductive sleeve made from metal, metal-matrix composite (MMC) materials, also referred to as metal-matrix material. The barrel core and barrel sleeve may include aligning features to prevent separation and movement of the sleeve along the core. The disclosed methods provide for material combinations and part designs that prevent separation of their parts over the life of the weapon barrel and allow the barrel to perform at high cadence over the whole temperature range the barrel is used.

A ballistic adjustment device for toy gun, includes a mounting member having a bearing portion located above a bullet barrel. When the mounting member moves up and down, a pressure member is released from or pressed against the bullet barrel to move a protruding portion of the bullet barrel up and down. A connecting rod is pivoted to a lower part of the mounting member and has a press portion that is pressed against an inclined surface of the rotary member. The rotary member is in communication with a magazine seat, such that the rotary member can be turned only by extending the operator's finger into the magazine seat, which makes the press portion moves high and low on the inclined surface, so as to move the connecting rod and the mounting member, and make the bearing portion move up and down to achieve the function of adjusting the trajectory.

A ballistic adjustment device for toy gun, includes a mounting member having a bearing portion located above a bullet barrel. When the mounting member moves up and down, a pressure member is released from or pressed against the bullet barrel to move a protruding portion of the bullet barrel up and down. A connecting rod is pivoted to a lower part of the mounting member and has a press portion that is pressed against an inclined surface of the rotary member. The rotary member is in communication with a magazine seat, such that the rotary member can be turned only by extending the operator's finger into the magazine seat, which makes the press portion moves high and low on the inclined surface, so as to move the connecting rod and the mounting member, and make the bearing portion move up and down to achieve the function of adjusting the trajectory.

Systems, methods, and apparatuses are described for accelerating projectiles at high velocity. A barrel may include one or more heaters configured to heat a bore of the barrel prior to launch of a projectile. The barrel bore may be formed in a tungsten sleeve and may be heated to high temperatures. Heat from the barrel bore may be transferred to expanding propellant behind a projectile as it travels through the barrel bore.

A weapon barrel has a barrel core composed of iron or nickel alloy and at least one barrel jacket made from a metal-matrix material encasing the barrel core. The jacket and core thereby form a metal-metal-matrix composite barrel. The metal-matrix material may have a specific tensile strength that is greater than or equal to 80 N.Math.m/g, and greater than or equal to the specific tensile strength of the barrels core material. The metal matrix material may include aluminum, titanium, beryllium and magnesium alloys, and composites, in addition to a filler material such as carbon nanotubes, graphite, diamond, carbides, and nitrides.

A weapon barrel has a barrel core composed of iron or nickel alloy and at least one barrel jacket made from a metal-matrix material encasing the barrel core. The jacket and core thereby form a metal-metal-matrix composite barrel. The metal-matrix material may have a specific tensile strength that is greater than or equal to 80 N.Math.m/g, and greater than or equal to the specific tensile strength of the barrels core material. The metal matrix material may include aluminum, titanium, beryllium and magnesium alloys, and composites, in addition to a filler material such as carbon nanotubes, graphite, diamond, carbides, and nitrides.

The invention relates to carrier tube developed for break action air rifles and carrying rifle barrel and rifle accessories.

The invention particularly relates to a barrel and accessory carrying tube (2) allowing placement of barrel of desire calibre and in a replaceable manner in a tube manufactured from solid and rigid polyurethane, plastic and plastic derivative materials by injection or cast method by use of moulds and also allowing placement of accessories enriching the rifle such as sight, iron sight, silencer thereon.

The invention relates to carrier tube developed for break action air rifles and carrying rifle barrel and rifle accessories.

The invention particularly relates to a barrel and accessory carrying tube (2) allowing placement of barrel of desire calibre and in a replaceable manner in a tube manufactured from solid and rigid polyurethane, plastic and plastic derivative materials by injection or cast method by use of moulds and also allowing placement of accessories enriching the rifle such as sight, iron sight, silencer thereon.

A machine gun has a barrel, a receiver assembly comprising a cover, a receiver base and a butt; lock frame comprising an extractor and a gas piston; bolt, return mainspring with guiding bar, gas piston tube, flash absorber, trigger mechanism, gunsight, butt sighting appliances, trigger pull and loading case. A barrel is made of a preform produced of steel doped with chromium, molybdenum and vanadium or chromium, nickel, and molybdenum, or chromium, molybdenum, vanadium and nickel. The barrel is coated inside and steel comprises the additional chemical elements.

A machine gun has a barrel, a receiver assembly comprising a cover, a receiver base and a butt; lock frame comprising an extractor and a gas piston; bolt, return mainspring with guiding bar, gas piston tube, flash absorber, trigger mechanism, gunsight, butt sighting appliances, trigger pull and loading case. A barrel is made of a preform produced of steel doped with chromium, molybdenum and vanadium or chromium, nickel, and molybdenum, or chromium, molybdenum, vanadium and nickel. The barrel is coated inside and steel comprises the additional chemical elements.