the real problem with co2 is the winther co2 realy don't like cold. i'll rather use hpa. as for the 13 ci canister it's on the heavy side , and all in front of the gun making it not as balanced as the 78 or the disco for that mather.

the disco and the 78 can be bulk fill so there is no need for the 13 ci canister of the 79 realy (my 2 cents)