The reason a 12 gram is a viable power source is because of the liquid co2 in it. The energy density is off the charts compared to HPA because of the phase change from liquid to gas.
I have my doubts that you could get enough energy packed into a 12 gram-sized container just through compression, at least not enough to be useful. The walls would have to be thicker, you'd need a regulator downstream, and you'd have to over-engineer the neck so that there's no chance of it being disengaged prematurely.
By my standards, a loose 12 gram is just barely on the good side of the fun/scary line at 800-1200 psi. A 4500psi 12 gram sized tank that doesn't need any phase change time to tap into its full potential energy would put a nice hole in a skull.
Originally Posted by agentSmith
oldschool play is about sportsmanship and respect, oldschool gear is available on Ebay.