Swiss Arms 12G CO2 Canister

These caplets are self contained units - you simply insert them into your gun's magazine, tighten the locking screw and you're done!

Each cannister contains enough Co2 for approximately 40-50 shots in GBB pistols, or up to 200 shots in NBB pistols. Your mileage may vary depending on how heavy the slide is, how well maintained the gun, or even how efficient it is.