BLOWBACK KIT FOR M4 SHS RIFLES (A3-RAK-M4)

Complete metal kit with blowback simulator
special aluminum construction with striking weight and balance wheel
steel return rod with bearing spring holder
oscillation spring with floating piston
locking screw with through hole
The set is easily installed inside the m4 tube
through the movement of the piston the kinetic energy releases a recoil effect directly on the butt of the rifle
having the system a delay time given by the distance between the explosion of the shot and the oscillation of the mass does not reduce the accuracy of the shot
compatible with marui m4 rifles with sliding stock and compatible