I don't think that would work like a Pump Mag. Since you don't have an on-off, there's nothing to keep the bolt from uncontrollable full-auto if you tweak the mechanism to not catch the bolt. Air from the reg would just blow it forward again.
__________________ Anonymous Assassins Paintball TeamJust look for the pink shirts MCB Feedback SpecOps Feedback Laws of Thermodynamics; 1) You cannot win, you can only break even. 2) You cannot break even.