Air guns and non-firearm guns for conventional metal jacket bullets are provided. Novel chamber and throat geometries, novel barrel rifling schemes, barrel materials, and surface technology facilitate manufacture or retrofit of air guns and other non-firearm guns to use standard size metal jacket bullets manufactured for conventional firearms.

A hand carryable, non-lethal personal protection device using compressed gas for operation. In some embodiments the device uses the compressed gas to create and shoot a vortex of air at the target. In other embodiments, the compressed gas can be used to shoot a burst of atomized water at the attacker. In still other embodiments the device uses the compressed gas to shoot ammunition, such as a ring airfoil, O-ring, bean bag, or other non-lethal blunt trauma munitions at the target. In still further embodiments, the device is modular in its construction, and can be used to apply the compressed gas to various different attachments.

A hand carryable, non-lethal personal protection device using compressed gas for operation. In some embodiments the device uses the compressed gas to create and shoot a vortex of air at the target. In other embodiments, the compressed gas can be used to shoot a burst of atomized water at the attacker. In still other embodiments the device uses the compressed gas to shoot ammunition, such as a ring airfoil, O-ring, bean bag, or other non-lethal blunt trauma munitions at the target. In still further embodiments, the device is modular in its construction, and can be used to apply the compressed gas to various different attachments.

A compressed air cannon includes a launch pipe and a gas tube. The launch pipe has a closed end and an open end. The gas tube is into the top of the launch pipe, where the gas tube has an outlet directed toward the closed end of the launch pipe.

A compressed air cannon includes a launch pipe and a gas tube. The launch pipe has a closed end and an open end. The gas tube is into the top of the launch pipe, where the gas tube has an outlet directed toward the closed end of the launch pipe.

A firing mechanism of an airsoft gun includes, in combination a gun body; a sleeve in a rear portion of the gun body; a discharge tube in a front end of the sleeve; a retaining ring on the front end of the sleeve; at least one assembly, each including an air canister and a piercing member facing the air canister; a locking member put on a rear end of the sleeve and configured to rotate to cause the piercing member to pierce the air canister of each of the at least one assembly; and an electromagnetic valve configured to activate by pulling a trigger. In response to opening the electromagnetic valve, pressurized air from the assembly drives a pellet out of the gun body.

An air reservoir system is provided that includes a switchable valve to direct input air to an air reservoir, or stored air in the air reservoir to a firing pathway. Various example embodiments of the present general inventive concept may also include an air-saver system to maintain a minimum air pressure in the air reservoir during a firing operation.

A gas powered gun and a pressure tube for a gas powered gun each comprises a gas regulator between a pressure chamber and a source of compressed gas. The gas regulator comprises a body forming first and second cylindrical portions connected to each other. The first cylindrical portion is in fluid connection with the pressure chamber. A piston is mounted for sliding movement in the first and second cylindrical portions. A valve seat is in the second cylindrical portion. An intermediate chamber is in the second cylindrical portion between the piston and the valve seat and in fluid connection with the source of compressed gas. A passageway through the piston connects the pressure chamber with the intermediate chamber. A biasing member presses the piston resiliently away from the valve seat. A valve seat adjusting mechanism is accessible to a user for adjusting a position of the valve seat.

A gas powered gun and a pressure tube for a gas powered gun each comprises a gas regulator between a pressure chamber and a source of compressed gas. The gas regulator comprises a body forming first and second cylindrical portions connected to each other. The first cylindrical portion is in fluid connection with the pressure chamber. A piston is mounted for sliding movement in the first and second cylindrical portions. A valve seat is in the second cylindrical portion. An intermediate chamber is in the second cylindrical portion between the piston and the valve seat and in fluid connection with the source of compressed gas. A passageway through the piston connects the pressure chamber with the intermediate chamber. A biasing member presses the piston resiliently away from the valve seat. A valve seat adjusting mechanism is accessible to a user for adjusting a position of the valve seat.

A lower receiver has a trigger assembly. An upper receiver is coupled to the lower receiver. The lower receiver has a bolt assembly and an L-shaped slot. The L-shaped slot has a long leg, a junction, and a short leg. The bolt assembly interacts with the L-shaped slot. The upper receiver has a rear end to which a compressed gas power source can be coupled. The upper receiver has a gas path from the compressed gas power source for firing a projectile through a barrel and for cocking the bolt assembly. The gas path is entirely contained by the upper receiver.