Guarder M4A1 Full Gearbox Set (Fit SP85-120)

A complete Gearbox Upgrade kit includes ALL parts for upgrading your Airsoft Electric Gun AEG 
Guarder made this kit with all suitable parts to super tune up your AEG Rifle 
The combination of difference parts allow an optimal result & performance 
Hard and rigid material used, including S304 Stainless Steel, Brass, Polycarbonate, Aluminum, Acetal and Steel 
As always, upgrading AEG require necessary skill & technique to dissemble the gearbox, consult expertise if needed 
100% Made In Taiwan with Top Quality Control making each parts precisely fit 
Note: Upgrade springs are not included 

FGS Kit Includes: 
Enhanced Gearbox Ver.2 
Switch Assembly (Front to Handguard ) 
Steel Gear Set 
Lucid Chromium Plating Cylinder 
Air Seal Nozzle 
Stainless Cylinder Head 
Enhanced Ventilation 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 
Safty Cover 
Teflon Grease