CO2 stock with quick latch system

1. An in-stock compressed fluid cartridge system for a gas powered airsoft gun, comprising:

a gas delivery assembly configured to deliver gas to an airsoft gun, the gas delivery assembly comprising:

a cartridge receiving portion configured to receive at least a portion of a compressed fluid cartridge,

a locking cap configured to secure the compressed fluid cartridge in the gas delivery assembly,

a puncture pin assembly configured to puncture a nozzle of the compressed fluid cartridge in response to the locking cap being closed over the compressed fluid cartridge,

a regulator to regulate a volume of gas passing from the gas delivery assembly, and

a plurality of expansion chambers configured to form a tortuous path, between the compressed fluid cartridge and the regulator, to expand liquid in fluid from the compressed fluid cartridge to gas; and

a buffer tube having a first end configured to be coupled to the airsoft gun, and a second end configured to receive the gas delivery assembly such that the buffer tube houses at least a portion of the gas delivery assembly.

2. The system of claim 1 , wherein at least one through hole is formed in a common wall between adjacent ones of the expansion chambers along the tortuous path to pass the fluid therebetween.

3. The system of claim 2 , wherein the fluid traveling through the expansion chambers exits the expansion chambers in a different direction from which the fluid enters the respective expansion chambers.

4. The system of claim 3 , wherein the fluid moves from the compressed fluid cartridge to the regulator sequentially through first, second, and third expansion chambers.

5. The system of claim 4 , wherein the first and third expansion chambers are formed in an axial direction of the gas delivery assembly and share a common wall therebetween, and the second expansion chamber is formed around at least portion of both the first and third expansion chambers.

6. The system of claim 1 , further comprising an exit nozzle provided in the first end of the buffer tube to supply the gas to the airsoft gun.

7. The system of claim 6 , wherein a holding chamber is formed between the regulator and the exit nozzle.

8. The system of claim 1 , wherein a pressure adjustment aperture is formed in the buffer tube to provide access to an adjustment mechanism of the regulator.

9. The system of claim 1 , wherein a setting aperture is provided in the buffer tube to receive an assembly set screw to set a position of the gas delivery assembly inside the buffer tube.

10. The system of claim 1 , wherein the cartridge receiving portion is coupled to a housing of the puncture pin assembly, expansion chambers, and regulator such that a distance between the locking cap and the puncture pin assembly is adjustable.

11. The system of claim 10 , wherein the cartridge receiving portion is coupled to the housing in a threaded configuration.

12. The system of claim 10 , further comprising:

a plurality of flats formed around an outer circumference of the cartridge receiving portion; and

a corresponding aperture formed in the buffer tube and configured to receive a cartridge receiving portion length set screw to contact one of the flats to set the distance between the locking cap and the puncture pin assembly.

13. The system of claim 1 , wherein the puncture pin assembly comprises:

a puncture pin;

a flange provided proximate the puncture pin;

a sealing member provided on a surface of the flange from which the puncture pin extends;

a base extending from the flange opposite the puncture pin; and

a fluid channel extending from the puncture pin through the base and into a first one of the expansion chambers,

wherein the puncture pin assembly is configured such that a threshold pressure in the first one of the expansion chambers moves the puncture pin assembly in a direction of the compressed fluid cartridge to seal off a portion of a housing of the puncture pin assembly that receives a nozzle of the compressed fluid cartridge.