Full tune-up Modify kit M4 Speed
Speed modify kit for M4-A1/Ris/SR16
Included:
Speed modular gear set
Cylinder
Piston head
7mm Stainless bushing
Cylinder head
Anti-reversal latch
Tappet
rotary spring guide
Ultra piston
Nozzle
Spring S100+
Lubriicant with PTFE