PTS EPF2-S Vertical Forgrip thread adapter Then adjust your horizontal screw

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

you need this hop unit in your build

5mm Side Wing 1 x CNC Steel Pivot Pin 1 x CNC Aluminum Hopup Lever 1 x CNC Aluminum Soft Round Nub 1 x CNC Aluminum Soft Flat Nub (4mm) 1 x CNC Aluminum Hard Concave Nub (4mm) 3 x Steel Nub Spring 1 x CNC Steel Spring Guide 1 x Steel Upper Compression Spring 1 x Steel Center Compression Spring 1 x CNC Delrin Locking C-Clip 1 x CNC Brass Barrel Spacer 1 x Brass Barrel Spacer Holder Oring 1 x CNC Aluminum Rotary Dial Knob 1 x CNC Aluminum Inlet Adaptor (OD11mm)

(When your gearbox is locked

You can replace the damaged rack with this one

PTS EPF2-S Vertical Forgrip thread adapter Then adjust your horizontal screwPTS 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