The no-bullet no-firing structure of the toy gun is disclosed. The toy gun has an impact unit and the no-bullet no-firing structure. The structure has a barrel component, a switch unit and a magazine unit. The switch unit has a pull lever with an abut lever, an elastic member with an elastic arm, and a push member. The magazine unit has a magazine, a bullet and a pulled member. The pulled member is pushed by the bullet to push the abut lever to make the pull lever, the push member and the impact unit be aligned on a same linear line. When no bullet is in the magazine, the abut lever is pushed by the elastic arm to rotate the pull lever pivotally, and the pull lever drives the push member to swing to make the toy gun be unable to fire.

An apparatus includes an energy source and an expansion structure. The energy source is configured to convey an amount of energy operable to increase a pressure of a compressible gas disposed in a chamber. The expansion structure is configured to be placed in fluid communication with the chamber and to receive a flow of the compressible gas in response to the increase in pressure. The expansion structure includes an inlet having a first diameter and an outlet having a second diameter greater than the first diameter and is configured to allow the compressible gas to expand as the compressible gas flows from the inlet to the outlet such that a supersonic free jet of the compressible gas exits the outlet. In some instances, the supersonic free jet of the compressible gas can accelerate, relative to the expansion structure, a projectile disposed outside of the expansion structure.

A pneumatic ball launcher includes a tube, a ball pathway unit, a push unit, a holding unit, an airway unit and a pneumatic unit. The ball pathway unit is used for connecting one end of the tube and wrapping part of a ball channel of the tube. The push unit includes a push bar, a slide base, a first driver and a second driver. The holding unit, detachably connected with the push unit, is used for holding the ball pushed by the push bar. The airway unit is connected with the holding unit. The pneumatic unit includes a valve mechanism, a pneumatic cylinder and a gas tank. When the valve mechanism opens to allow the gas tank to discharge into the holding unit via the airway unit, the ball held by the holding unit would be ejected out of the tube.

An apparatus includes an energy source and an expansion structure. The energy source is configured to convey an amount of energy operable to increase a pressure of a compressible gas disposed in a chamber. The expansion structure is configured to be placed in fluid communication with the chamber and to receive a flow of the compressible gas in response to the increase in pressure. The expansion structure includes an inlet having a first diameter and an outlet having a second diameter greater than the first diameter and is configured to allow the compressible gas to expand as the compressible gas flows from the inlet to the outlet such that a supersonic free jet of the compressible gas exits the outlet. In some instances, the supersonic free jet of the compressible gas can accelerate, relative to the expansion structure, a projectile disposed outside of the expansion structure.

A pneumatic ball launcher includes a tube, a ball pathway unit, a push unit, a holding unit, an airway unit and a pneumatic unit. The ball pathway unit is used for connecting one end of the tube and wrapping part of a ball channel of the tube. The push unit includes a push bar, a slide base, a first driver and a second driver. The holding unit, detachably connected with the push unit, is used for holding the ball pushed by the push bar. The airway unit is connected with the holding unit. The pneumatic unit includes a valve mechanism, a pneumatic cylinder and a gas tank. When the valve mechanism opens to allow the gas tank to discharge into the holding unit via the airway unit, the ball held by the holding unit would be ejected out of the tube.

A barrel assembly for a paintball gun includes a first barrel portion, a second barrel portion, and an insert. The insert is inserted into and positioned within bores of the first barrel portion and the second barrel portion. The first barrel portion and the second barrel portion include corresponding connection mechanisms that allow the first barrel portion and the second barrel portion to removably couple with one another. The insert includes a ridge that is fixed positioned between the first barrel portion and the second barrel portion when the first barrel portion and the second barrel portion are coupled. The first barrel portion and the second barrel portions can receive inserts with different bore sizes (e.g., inner diameter).

A barrel assembly for a paintball gun includes a first barrel portion, a second barrel portion, and an insert. The insert is inserted into and positioned within bores of the first barrel portion and the second barrel portion. The first barrel portion and the second barrel portion include corresponding connection mechanisms that allow the first barrel portion and the second barrel portion to removably couple with one another. The insert includes a ridge that is fixed positioned between the first barrel portion and the second barrel portion when the first barrel portion and the second barrel portion are coupled. The first barrel portion and the second barrel portions can receive inserts with different bore sizes (e.g., inner diameter).

An apparatus includes an energy source and an expansion structure. The energy source is configured to convey an amount of energy operable to increase a pressure of a compressible gas disposed in a chamber. The expansion structure is configured to be placed in fluid communication with the chamber and to receive a flow of the compressible gas in response to the increase in pressure. The expansion structure includes an inlet having a first diameter and an outlet having a second diameter greater than the first diameter and is configured to allow the compressible gas to expand as the compressible gas flows from the inlet to the outlet such that a supersonic free jet of the compressible gas exits the outlet. In some instances, the supersonic free jet of the compressible gas can accelerate, relative to the expansion structure, a projectile disposed outside of the expansion structure.

The invention relates to small arms. A training attachment comprises a housing having an element for fastening to a combat or dummy firearm, a barrel for a projectile, spring-loaded elements for feeding, ramming and storing a projectile, and gas channels. Lightweight elements, for example airsoft or paintball pellets, are used as the projectile. A shot is fired using standard blank cartridges. The technical result is the firing of a projectile from a combat or dummy weapon with negligible energy during tactical drills with assessment of aim and hit accuracy.

An apparatus includes an energy source and an expansion structure. The energy source is configured to convey an amount of energy operable to increase a pressure of a compressible gas disposed in a chamber. The expansion structure is configured to be placed in fluid communication with the chamber and to receive a flow of the compressible gas in response to the increase in pressure. The expansion structure includes an inlet having a first diameter and an outlet having a second diameter greater than the first diameter and is configured to allow the compressible gas to expand as the compressible gas flows from the inlet to the outlet such that a supersonic free jet of the compressible gas exits the outlet. In some instances, the supersonic free jet of the compressible gas can accelerate, relative to the expansion structure, a projectile disposed outside of the expansion structure.