This is my airsoft shotgun. It is quite near completion, however, i'm stuck. I have two m120(?) springs powering this beast. I need to come up with a trigger system that will hold back all of this force, while still having a semi-easy trigger pull. There is a metal screw that needs to be held back once i pump the, well, pump (the screw is pushed back by the pump.) Any input on this would be greatly appreciated. (BTW, i thought about a paint ball gun's trigger, but the only problem with that is that the screw has to lock back too far for this to be a viable option.) Also, the third picture is a shell. It would be filled with approx. 30 bbs and a cotton ball or toilet paper would plug both ends. The bolt has a part that extends through the shell and would force the bbs out.