Gearbox Upgrades

Speed Blade Tunable HPA M4 Trigger - Gold (SA5012)

Speed Blade Tunable HPA M4 Trigger - Black (SA5005)

SHS

SHS Upgrade M140 Spring Variable Pitch For Airsoft AEG Guns

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)