Complete Gear Boxes Rear Wire (With Long Spring guide)

Product Details:
- Reinforced EFCS Metal gearbox shell
- Ares High Quality Spring

- Reinforced full teeth piston
- Upgrade blue EFCS circuit board
- Delayer

EFCS Features:

- Precise magnetice sensors control piston position
- Reduce stresses on spring, spring last longer and more stable muzzle velocity
- Require less battery power to initiate motor
- Onboard ABS enhance piston positioning
- Braking power always cut off after completed cycle to save battery

- Electronic trigger for instant trigger response
- Quick Spring release function

- Long spring guide:AM-007 to AM-012. 
- Shot spring guide: AM-001 to AM-006, AM-013 & AM-014.{: