A kickback structure for a toy gun, the toy gun has a body portion and a barrel connected to the barrel, the handle portion is provided with the handle and the trigger assembly, and has a chamber inside. A piston is pushed forward by a first spring, and the a front and the back of the body portion are respectively provided with an aiming base and a fixed base, and the aiming base is provided with a through hole at the center, and the through hole is provided with a sliding sleeve, and the sliding sleeve is internally coupled between the sliding sleeve and the fixed base. A pushing rod is normally stretched by the second spring.

A kickback structure for a toy gun, the toy gun has a body portion and a barrel connected to the barrel, the handle portion is provided with the handle and the trigger assembly, and has a chamber inside. A piston is pushed forward by a first spring, and the a front and the back of the body portion are respectively provided with an aiming base and a fixed base, and the aiming base is provided with a through hole at the center, and the through hole is provided with a sliding sleeve, and the sliding sleeve is internally coupled between the sliding sleeve and the fixed base. A pushing rod is normally stretched by the second spring.

A kickback structure for a toy gun, the toy gun has a body portion and a barrel connected to the barrel, the handle portion is provided with the handle and the trigger assembly, and has a chamber inside. A piston is pushed forward by a first spring, and the a front and the back of the body portion are respectively provided with an aiming base and a fixed base, and the aiming base is provided with a through hole at the center, and the through hole is provided with a sliding sleeve, and the sliding sleeve is internally coupled between the sliding sleeve and the fixed base. A pushing rod is normally stretched by the second spring.

A kickback structure for a toy gun, the toy gun has a body portion and a barrel connected to the barrel, the handle portion is provided with the handle and the trigger assembly, and has a chamber inside. A piston is pushed forward by a first spring, and the a front and the back of the body portion are respectively provided with an aiming base and a fixed base, and the aiming base is provided with a through hole at the center, and the through hole is provided with a sliding sleeve, and the sliding sleeve is internally coupled between the sliding sleeve and the fixed base. A pushing rod is normally stretched by the second spring.

An example simulated weapon includes a delayed trigger and a pellet ejector. The delayed trigger includes a chamber and a piston slidable between armed and triggering positions. A spring biases the piston towards the triggering position. A locking member releasably locks the piston in the armed position. Release of the piston by the locking member causes the spring to move the piston from the armed position to the triggering position. The pellet ejector is coupled to the delay trigger to be triggered by the delay trigger in the triggering position. The pellet ejector includes a pressure chamber to receive a pressurized fluid and a pellet chamber to receive pellets. A valve is disposed between the pressure chamber and the pellet chamber communicates pressure from the pressure chamber to the pellet chamber. A barrel that extends through the pressure chamber is connected to the pellet chamber to eject the pellets.

An example simulated weapon includes a delayed trigger and a pellet ejector. The delayed trigger includes a chamber and a piston slidable between armed and triggering positions. A spring biases the piston towards the triggering position. A locking member releasably locks the piston in the armed position. Release of the piston by the locking member causes the spring to move the piston from the armed position to the triggering position. The pellet ejector is coupled to the delay trigger to be triggered by the delay trigger in the triggering position. The pellet ejector includes a pressure chamber to receive a pressurized fluid and a pellet chamber to receive pellets. A valve is disposed between the pressure chamber and the pellet chamber communicates pressure from the pressure chamber to the pellet chamber. A barrel that extends through the pressure chamber is connected to the pellet chamber to eject the pellets.

The present invention discloses an air gun. The air gun having a recoil gas unit and a bolt carrier unit. The recoil gas unit comprises a recoil guide tube configured to supply compressed air and a recoil assembly spring for movement of the recoil tube carrier. The bolt carrier unit is coupled to the recoil gas unit and comprises a piston disposed at a first end of the bolt carrier unit. The bolt carrier unit also comprises a valve chamber for performing a firing stroke of the air gun. The bolt carrier unit also comprises a piston chamber integrated at a second end of the bolt carrier unit. The piston chamber is configured to facilitate movement of the piston and to receive the compressed air, for performing a recoiling stroke of the air gun. The recoil gas unit facilitates the firing stroke and the recoiling stroke of the air gun.

The present invention discloses an air gun. The air gun having a recoil gas unit and a bolt carrier unit. The recoil gas unit comprises a recoil guide tube configured to supply compressed air and a recoil assembly spring for movement of the recoil tube carrier. The bolt carrier unit is coupled to the recoil gas unit and comprises a piston disposed at a first end of the bolt carrier unit. The bolt carrier unit also comprises a valve chamber for performing a firing stroke of the air gun. The bolt carrier unit also comprises a piston chamber integrated at a second end of the bolt carrier unit. The piston chamber is configured to facilitate movement of the piston and to receive the compressed air, for performing a recoiling stroke of the air gun. The recoil gas unit facilitates the firing stroke and the recoiling stroke of the air gun.

A method of manufacturing an engine piston may include performing upper-body formation for forming an upper body as an upper portion of a piston body by pressing a powder-type sintered material, performing lower-body formation for forming a lower body as a lower portion of the piston body by pressing a powder-type sintered material, performing bonding for forming the piston body by providing a brazing material between the upper body and the lower body and brazing the upper body and the lower body to each other while sintering a sintered material, performing machining for removing pores from the surface of the piston body by machining the surface, and performing heat treatment for forming a passive film by performing at least one of nitriding heat treatment or oxidation heat treatment on the surface of the piston body.

A method of manufacturing an engine piston may include performing upper-body formation for forming an upper body as an upper portion of a piston body by pressing a powder-type sintered material, performing lower-body formation for forming a lower body as a lower portion of the piston body by pressing a powder-type sintered material, performing bonding for forming the piston body by providing a brazing material between the upper body and the lower body and brazing the upper body and the lower body to each other while sintering a sintered material, performing machining for removing pores from the surface of the piston body by machining the surface, and performing heat treatment for forming a passive film by performing at least one of nitriding heat treatment or oxidation heat treatment on the surface of the piston body.