Descripción
MODIFY Full Tune-up Kit for M4-A1/RIS/SR16 (Torque 21.6 / S130+)
Modular Gear Set + Bore-up Cylinder + Bore-up Piston head + Stainless Bushinges + Bore-up Cylinder head + Anti-reversal Latch + Tappet + Rotary spring guide + Piston + Nozzle + Spring + Synthetic Lubricant with PTFE.