[ap27]

You can't really remove the CO2 canister because the first time you screw it into the magazine, you break the seal on the top. Removing it from the magazine will simply vent all the CO2 into the air, and you'll have to screw in a new canister. You'll have to just remove the magazine from the gun and keep it separately, with the CO2 capsule still inside the magazine. Its always a good idea to not leave the magazine in the gun, whether its propane or CO2.