Systema M16A2 / SR16 Gear Mech Box M150

Systema Complete Mecha-Box for M16-A2 / M15 / SR16
- Complete Drop In Gear Box for Full Stock Rear Battery M16 / M15 with M150 Upgrade Spring for 470 - 500 FPS
- All internal parts completed upgraded with Systema Parts (gears, bearings, tappet late, cylinder, bearing spring guide rod, selector plate, low resistance wires)
- Completely Reinforced Heavy Duty Alloy Gear Box
- Includes All Helical Super Torque Up Gear Set with Bore Up Cylinder Set
- Highest Option Possible! Most Powerful in the Airsoft Industry!
- Not Compatible with ICS or Olympic Arms M4 Series Due to 2 Piece separate Gear Box Design

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