While reading "Popular Mechanics Dec 05" during my period two spare, I couldn't help but notice a writeup on the tippmann C-3. Of course who cares about a paintball gun? Exactly! What I do care about is the possible application of combustion in airsoft. Yes I just said combustion.
"Unlike C02 or compressed air, a tiny amount of propane is ignited by a spark plug creating a combustion that propels the paintball out the barrel."
"...and it gets 50,000 shots from one $3 propane tank."
The rest can be found here: http://www.specialopspaintball.com/a...tippmannc3.asp