PTS EPF2-S Vertical Forgrip thread adapter you need this hop unit

you need this hop unit in your build

Then adjust your horizontal screw so that it is touching your trigger

You can replace the damaged rack with this one

Wide use Piston

(When your gearbox is locked

PTS EPF2-S Vertical Forgrip thread adapter you need this hop unitPTS EPF2 S Vertical grip , the ultimate stubby vertical grip! Light weight. Low drag snag free design prevents interference with other gear. Clean lines and elegant design provides improved aesthetics and ergonomics. Flat sides give the shooter more torsion for improved yaw control when manipulating the rifle. Aggressive enhanced texturing to increase surface traction but strategically paneled with comfort in mind. Storage compartment for storage of