How available is the type of gas you need to use pistols?

Can it be bought in any store or does all of it need to be ordered online?

depends on where you are i guess. it's not too hard to find where i live

for me its not to bad, just gotta find a paintball/airsoft outfitter, or local field in your area, do a google search for local shops around your zipcode...

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"The object of war is not to die for your country, but to make the other poor bastard die for his."