hey guys here some advice, i use to play alot of paintball and the part ur looking for is a on/off asa. You can find one at any online paintball store. Mkae sure you get the Eclipse OOPS not the POPS. The OOPS has a knob you can screw in an out so you can actually set it to leak out very slowly for efficiency. Your idea actually interested me though cause I didnt even think about supllementing with a co2 canister. Im actually gonna try but I need to pick up a co2 tank first(compressed air is alot more efficient in pb
).