High pressure air system for airsoft gun

1. A high pressure air cylinder-nozzle assembly configured for use with a gun, comprising:

a cylinder frame body;

a piston assembly including a piston base and a nozzle, the piston assembly defining a central air channel through the piston base and nozzle, the piston base being configured to move along an axis in the cylinder frame body relative to the nozzle in at least one stage of multi-stage piston assembly movements between forward and back positions, and simultaneously with the nozzle in at least another stage of the multi-stage piston assembly movements; and

a solenoid valve configured to direct air to the piston base to move the piston base between the forward and back positions.

2. The high pressure air cylinder-nozzle assembly of claim 1 , wherein a physical coupling of the piston base and the nozzle causes the simultaneous movement of the piston base and the nozzle in the at least another stage of the multi-stage piston assembly movements.

3. The high pressure air cylinder-nozzle assembly of claim 1 , further including a biasing member configured to bias the nozzle in a forward direction such that the nozzle moves simultaneously with the piston base in the at least another stage of the multi-stage piston assembly movements.

4. The high pressure air cylinder-nozzle assembly of claim 3 , wherein the biasing member is a spring having a first end contacting a solenoid body containing the solenoid valve, and a second end coupled to the nozzle.

5. The high pressure air cylinder-nozzle assembly of claim 4 , further comprising a piston insert provided inside the piston base between the spring and the nozzle and coupled to the nozzle, the piston insert being configured to physically interact with the piston base to simultaneously move the nozzle in the at least another stage of the multi-stage piston assembly movements.

6. The high pressure air cylinder-nozzle assembly of claim 5 , further comprising a central head member at a forward end of the solenoid body, the central head member being configured to receive the first end of the spring.

7. The high pressure air cylinder-nozzle assembly of claim 3 , wherein the nozzle is configured with a protruding member on an outer diameter thereof, the protruding member being configured to abut an inner surface of the cylinder frame body at a certain point along a forward movement of the piston assembly.

8. The high pressure air cylinder-nozzle assembly of claim 7 , wherein a first stage of forward movement of the piston assembly includes the piston base member and the nozzle moving forward until the protruding member contacts the inner surface of the cylinder frame to stop movement of the nozzle, and a second stage of forward movement of the piston assembly includes the piston base member continuing to move forward until progress is physically impeded.

9. The high pressure air cylinder-nozzle assembly of claim 8 , further comprising a baffle member at least partially enclosing the piston base member, and configured such that a portion of the piston base member contacts a portion of the baffle member to stop forward progress of the piston base member during a forward movement.

10. The high pressure air cylinder-nozzle assembly of claim 9 , wherein an opening is created when the piston base member approaches an end of the forward movement, the opening allowing air from the solenoid valve to move through a central air channel formed in the nozzle.

11. The high pressure air cylinder-nozzle assembly of claim 9 , wherein the solenoid valve closes after a predetermined time has passed since the piston base member completed the forward movement to the forward position.

12. The high pressure air cylinder-nozzle assembly of claim 11 , further comprising an auxiliary air channel provided in the cylinder frame body to deliver air to a front portion of the piston base member when the solenoid valve is closed to force the piston base portion into a first stage of a backward movement.

13. The high pressure air cylinder-nozzle assembly of claim 12 , wherein the piston base member is physically coupled to the nozzle after a certain length of backward movement relative to the nozzle, causing simultaneous movement with the nozzle until the piston assembly reaches the back position.

14. The high pressure air cylinder-nozzle assembly of claim 1 , wherein the solenoid valve is a two-way valve.

15. The high pressure air cylinder-nozzle assembly of claim 1 , wherein the gun is an airsoft gun.

16. The high pressure air cylinder-nozzle assembly of claim 1 , wherein an antepiston chamber is formed behind the piston base during forward movement of the piston base.

17. A high pressure air cylinder-nozzle assembly configured for use with a gun, comprising:

a solenoid having a solenoid valve; and

a piston assembly including a piston base member and a nozzle to deliver high pressure air from the solenoid valve through a central air channel formed in the nozzle;

wherein the high pressure air from the solenoid valve moves the piston assembly forward to create an opening to the central air channel; and

wherein the piston base member moves relative to the nozzle during a portion of the forward movement, and simultaneously with the nozzle during another portion of the forward movement.

18. The high pressure air cylinder-nozzle assembly of claim 17 , wherein closing of the solenoid valve redirects high pressure air to move the piston assembly backward to a back position such that the piston base member moves relative to the nozzle during a portion of the backward movement, and simultaneously with the nozzle during another portion of the backward movement.