All started wen bullet pusher stock and didn't return to its initial position. At first place i changed batteries to new energizers and nothing changed. I disassembled gun and i saw that package in witch was pusher motor is a bit deformed. Then i changed to new more powerful motor witch operates at 6-9V, then pusher starts to move, but slowly. Then i desoldered everything and rewired without safety buttons. So now rollers spins fast, but as soon as i push trigger everything slows down, so i think that pusher toothed is missaligned and it is too hard to mowe.
Well, thanks for help.
My son is happy that it in general shots.
Sounds like a short in the circuit based off the trigger press, I don't know a ton about rapidstrike internals, but if there is a electronic aspect to the trigger pull, try e-taping any solder points and see what happens, also check and make sure that none of your lead wires are kinked or bent really tight.