Modify Full Tune-up Kit for M4-A1/RIS/SR16 (Torque 21.6/ S120+)[GF207201]
Includes:
- Speed Modular Gear Set
- Cylinder
- Piston head
- 7mm Stainless Bushing
- Cylinder head
- Anti-reversal Latch
- Tappet
- Rotary spring guide
- Ultra Piston
- Nozzle
- Spring (S100+)
- Synthetic Lubricant with PTFE