Suitable for M4A1/ M4RIS/ M4 S-System
High Performance full option gearbox with all Systema parts
Includes:
*M120 Spring
*Reinforced Gearbox with 7mm Bearing
*Teflon Cylinder Set
*Torque Up Spur Gear Set
*Low Resistance Switch Assembly
*Selector Plate / Tappet Plate / etc.
This product was added to our catalog on Thursday 01 March, 2007.