CO2 stock with quick latch system

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.