If you're looking to make a sniper efficient enough to get good shot counts from 12-grams, best of luck to you. It takes a lot of fiddling around with spring weights, which can get expensive when you have to use a new cartridge each time you make an internal change to rig.
Originally Posted by pballer0303
If you do choose to go regg'd, verry few regulators are designed to take that high of an input pressure, so be careful
Shouldn't be that high at all. Barring a liquid spike, a 12-gram CO2 cartridge should output the same 800-850psi that standard high-output HPA regs do.