Grinding Noise
 

I own a Velocity Arms 36 Compact. When I fire, the weapon makes a grinding noise. I have tried adjusting the pressure switch and charging the battery but neither worked. Any suggestions? I have tried to check if the gears are stripped but on the damn stupid design of the VA36 Compact, the bolt for me to check the gears (It connects the pistol grip to the gear box) is glued in. So if anyone has any suggestions on how to fix this or how to access the gear box by removing the pistol grip, please, do tell.

motor is to low?

Already tried that but I might of been doing it wrong. Do I adjust the pressure switch on the bottom of the grip?

the little screw goes up and down, only thing is, if the pinion gear on the motor is stripped no height adjustments are going to help.