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.

An improvised projectile checking housing assembly having latch button and first and second sidewalls with first and second catch apertures opening as a catch latch recess of elongated structure using an improvised projectile checking spring opening to receive a locking key structure based upon the projectile receiving opening to the improvised projectile checking housing assembly. Alternate rearward translating lock gauge at the backside of a dart drum uses a follower and engaging cam surfaces locking and unlocking a pathway for correct dart alignment. Alternate motorized, non-motorized and pneumatic structures are disclosed with apparatus launch operations moving between checking and non-checking positions.

An improvised projectile checking housing assembly having latch button and first and second sidewalls with first and second catch apertures opening as a catch latch recess of elongated structure using an improvised projectile checking spring opening to receive a locking key structure based upon the projectile receiving opening to the improvised projectile checking housing assembly. Alternate rearward translating lock gauge at the backside of a dart drum uses a follower and engaging cam surfaces locking and unlocking a pathway for correct dart alignment. Alternate motorized, non-motorized and pneumatic structures are disclosed with apparatus launch operations moving between checking and non-checking positions.

An improvised projectile checking housing assembly having latch button and first and second sidewalls with first and second catch apertures opening as a catch latch recess of elongated structure using an improvised projectile checking spring opening to receive a locking key structure based upon the projectile receiving opening to the improvised projectile checking housing assembly. Alternate rearward translating lock gauge at the backside of a dart drum uses a follower and engaging cam surfaces locking and unlocking a pathway for correct dart alignment. Alternate motorized, non-motorized and pneumatic structures are disclosed with apparatus launch operations moving between checking and non-checking positions.

An improvised projectile checking housing assembly having latch button and first and second sidewalls with first and second catch apertures opening as a catch latch recess of elongated structure using an improvised projectile checking spring opening to receive a locking key structure based upon the projectile receiving opening to the improvised projectile checking housing assembly. Alternate rearward translating lock gauge at the backside of a dart drum uses a follower and engaging cam surfaces locking and unlocking a pathway for correct dart alignment. Alternate motorized, non-motorized and pneumatic structures are disclosed with apparatus launch operations moving between checking and non-checking positions.

A cocking and loading system for an air rifle utilizes a movable compression cylinder linked to the cocking arm to urge a piston into a cocked position, wherein the compression cylinder returns to a rest position urging a pellet feed tube through a magazine to load a pellet into the barrel.

A cocking and loading system for an air rifle utilizes a movable compression cylinder linked to the cocking arm to urge a piston into a cocked position, wherein the compression cylinder returns to a rest position urging a pellet feed tube through a magazine to load a pellet into the barrel.

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 projectile launching apparatus includes a bolt (for chambering a projectile) and a bolt valve with a gas passageway for communicating the gas from a chamber housing to a breech assembly. Gas received within the gas chamber is compressed by a piston and communicated through the breech assembly to a projectile. The compressed gas expands in the barrel, thereby propelling the projectile out of the barrel in a single stroke of the piston. The bolt may be returned to an initial position by a magnet and/or spring that is coupled to the valve, and the piston may be returned to an initial position by way of vacuum pressure. The bolt valve may also include a mechanical retention element such as a sear and a release pin. The sear may the bolt in a first position until the piston from the compressor has moved sufficiently to push the release pin.

A projectile launching apparatus includes a bolt (for chambering a projectile) and a bolt valve with a gas passageway for communicating the gas from a chamber housing to a breech assembly. Gas received within the gas chamber is compressed by a piston and communicated through the breech assembly to a projectile. The compressed gas expands in the barrel, thereby propelling the projectile out of the barrel in a single stroke of the piston. The bolt may be returned to an initial position by a magnet and/or spring that is coupled to the valve, and the piston may be returned to an initial position by way of vacuum pressure. The bolt valve may also include a mechanical retention element such as a sear and a release pin. The sear may the bolt in a first position until the piston from the compressor has moved sufficiently to push the release pin.