FPS ZERO-SHOCK piston in technopolymer with full metal carbon fiber rack 14 teeth (PM04CF)

FPS is proud to present the first piston with a body in technopolymer loaded carbon fiber and rack with all metal teeth equipped with a zero-shock shock absorbing system 100% Made in Italy.

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

For the material of the body, a technopolymer loaded with carbon fiber and addition of a small percentage of elastomer has been studied which gives high mechanical performances and a very low friction coefficient.

The rack was manufactured using MIM technology (Metal Injection Molding) given that this production process guarantees dimensional precision and robustness practically equal to those of solid machining.
The rack appears with the second tooth missing and with the third already lowered 3 tenth of a millimeter, as this configuration prepares the piston itself for a correct engagement angle (AOE) and makes it suitable for high burst speed.
The type of metal injected is SAE 4650 surface treated with HRC38-42° hardening which is currently considered the best material on the market for this type of use.
The slide guides are designed to minimize friction and retain lubricant for a long period of time.
The seat of the rack is decentralized to favor the coupling between the teeth of the piston 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.
Special ribs reduce the contact surface between the spring and the internal part of the piston body and consequently the friction between the metal and the technopolymer is also reduced during the contraction and elongation due to the firing cycle.

100% MADE IN ITALY
100% MARUI COMPATIBLE