CO2 quality is critically important to the health of your air gun; Ensure a lifetime of performance with this clean CO2 from Umarex. Tested and proven clean; Doesn't dirty your air gun valves.

[Philysteak527] modified a Nerf rifle, making it semi-automatic thanks to the powers of compressed air. This is not a simple ... and uses a CO2 canister and solenoid valve for the firing action.