Guarder SP150 Infinite Torque-Up Kit for TM M4-A1 Series (ITK-40)

Full Tune-Up Kit

SP150 Spring
Infinite Torque-Up Steel Gear
Bore-Up Lucid Chromium Plating Cylinder
Bore-Up Air Seal Nozzle
Bore-Up Stainless Cylinder Head
Bore-Up Enhanced Ventilation Piston Head
Polycarbonate Piston
6mm Steel Bushing
Steel Anti Reversal Latch
Steel Enhanced Cut-Off Lever
Ball Bearings Spring Guide
Enhanced Tappet
Shim Set