12-GRAM CO2 POWERLETS - Compatible with most air rifles and air pistols SNUG FIT, SOLID SEAL - For reliable and consistent performance 40-COUNT BOX - Ideal for the air gun target sport enthusiast ...

[Philysteak527] modified a Nerf rifle, making it semi-automatic thanks to the powers of compressed air ... that fits in the gun, works with the Nerf ammo, and uses a CO2 canister and solenoid ...