Our take: This SRC Version 2 M4/ M16 Gearbox is the factory installed gearbox in all STRYKE Series M4 AEGs, combining a high speed internal components with a durable full metal shell. This is a complete drop-in gearbox solution for those who are looking for a "CQB Legal" (shooting between 330-350 FPS) gearbox, that is both durable and economical. Wired to the rear, this gearbox is perfect for most full stock M16's or crane stock M4's. This complete full metal M4/ M16 Version 2 Gearbox is ready to go/install right out of the box. Whether you are looking for a reliable replacement gearbox, or you want a drop-in gearbox that will allow your M4 to be CQB friendly, this STRYKE Series Gearbox has you covered.
Type: Version 2 M4/ M16 Gearbox
Shell Construction: Full Metal
Piston: Polycarbonate High Speed
Bushings: 6mm Polymer
Spring Guide: Polymer
Cylinder: Full Metal Full Seal
Cylinder: Full Metal High Flow
Air Nozzle: Plastic
Spring Power: M100
Gears: Full Metal Straight Cut High Speed
Wiring: Standard Resistance Wiring to the Rear
Package Includes: Complete Version 2 SRC STRYKE Series Gearbox,
Note: Ready to use right out of the box, though professional installation is recommended/may be required. Motor/base plate not included.