Gearbox Upgrades

SHS

SHS Upgrade M100 Spring Variable Pitch For Airsoft AEG Guns

Modify

Modify V6 Gearbox Cylinder Head (P90)

Modify Type 2 M4 Bore-Up Cylinder

Modify Silent Polycarbonate Bore-Up Piston Head

Modify

Modify 8MM Bearing Set - Stainless Steel (GB-03-38)

Modify

Modify Stainless Steel Bushing - 8mm

Modify

Modify Stainless Steel Ball Bearing Bushing - 7mm

Modify

Modify Ultra Piston Body - 7 Metal Teeth (GB-07-03)

Modify

Modify AOE Piston Body - 10 Metal Teeth (GB-07-05)

Modify

Modify Mod24/APS-2 Sniper Rifle Spring - M170

Modify

Modify Mod24/APS-2 Sniper Rifle Spring - M110

Madbull

MadBull Non-Linear Spring Upgrade M140 ( 450 to 470 FPS) for Metal AEG Gearboxes