FPS is proud to present the first M4 MARUI NGRS piston with a technopolymer body and all metal teeth 100% Made in Italy.

This loaded technopolymer assures great mechanical resistance and dimensional precision. The rack is manufactured with MIM (Metal Injection Molding) technology, since this production process guarantees dimensional accuracy and sturdiness equal to those of solid machining.
The type of metal injected is SAE 4650 which is currently considered the best material on the market for this type of use.
The sliding guides are designed to minimize friction and hold lubricant for a long period of time.

Weight: 16.71g