Gun Building, Modifications & Repairs
I've been modding a Umarex/Elite Force TAR-21 for the past few months. I installed low-profile bushings (the gun had bearings), SHS 13.65:1 gears, an ASG Infinity Boost 30K RPM 16TPA Short Motor (high torque), a Raptors piston head, and a stock G&G piston. I also shimmed the gears, adjusted...