Originally Posted by
Lurker27
A typical revolver uses only finger force to cycle the cylinder and cock the hammer (which then releases, and the hammer hits a striker that concentrates the work of the trigger pull).
The key thing is, the energy contained in a trigger pull is doing a lot of stuff. Because you don't have the luxury of igniting a substance, you're talking about low force actuation mechanisms. I'm assuming that the form factor would necessitate a 12g in low volume, so I'd balance a poppet valve, if I could, to avoid having to have a heavy hammer (big!) or rally ridiculous spring (really horrible trigger pull). I don't trust spools under really high pressures.