Fps is proud to present the first lightened piston with a technopolymer body and with all metal teeth equipped with a 100% Made in Italy ZERO-SHOCK shock - absorbing system.

This system patented by FPS allows to attenuate the stresses that the rack transmits to the piston body, making the assembly enormously more resistant and reliable than a normal piston.

A technopolymer loaded with the addition of a small percentage of elastomer has been studied for the material of the body which confers high mechanical performances and a very low friction coefficient.

The rack was manufactured through the use of MIM (Metal Injection Molding) technology since this production process guarantees dimensional precision and robustness practically equal to those of solid machining.
The rack is presented with the second missing tooth and with the third tooth already lowered by 3 tenths of a millimeter, as this configuration prepares the piston for a correct engagement angle (AOE) and makes it suitable for high burst speed.
The type of metal injected is SAE 4650 treated superficially with hardening HRC38-42 ° which is currently considered the best material on the market for this type of use.
The sliding guides are designed to minimize friction and retain the lubricant for a long period of time.
The rack seat is decentralized to facilitate the coupling between the piston teeth and those of the sector gear.
The longitudinal reinforcements on the sides of the teeth increase the strength of the piston and avoid contact of the rack with the internal wall of the cylinder.
Appropriate ribs decrease the contact surface between the spring and the internal part of the piston body and consequently also the friction between metal and technopolymer is decreased during the contraction and elongation due to the firing cycle.

Weight: 15.2g

100% MADE IN ITALY
100% MARUI COMPATIBLE