Guarder M4-A1 Full Gearbox Set (Infinite Torque-Up – FGS-11)
- Enhanced Gearbox Ver.II
- Bore-Up Lucid Chromium Plating Cylinder
- Switch Assembly (Front to Handguard )
- Steel Gear Set (Infinite Torque-Up)
- Bore-Up Air Seal Nozzle, Stainless Cylinder Head & Piston Head
- Polycarbonate Piston
- Anti-Heat Selector Plate
- 6mm Steel Bushing
- Steel Anit-Reversal Latch
- Steel Enhanced Cut-Off Lever
- Ball Bearings Spring Guide
- Enhanced Tappet
- Shim Set
- Gearbox Inside Spring Set
- Steel Trigger Set
- Safety Cover
- Teflon Grease
