A piston engineered to pair low reciprocating mass with a hard-wearing metal tooth rack: the carbon-loaded technopolymer body keeps weight and friction down while the full-metal 14T rack provides long-life engagement. Designed for M4 Marui NGRS configurations with 14-tooth racks, tolerances and finish ease installation and ensure reliability under demanding use — ideal for performance upgrades and professional maintenance.

Technical specifications

Model: FPS PM05CF — carbon-loaded technopolymer piston with full metal rack, 14 teeth.

Rack: 14 teeth, metal construction for improved wear resistance.

Body: technopolymer loaded with carbon fiber to reduce mass and friction.

Purpose: piston optimized for high-performance setups; compatible with M4 Marui NGRS sector gear systems (14T).

Compatibility: Marui compatible — intended for M4 NGRS gearboxes with full metal rack 14T.

Origin: Made in Italy.

Reference / SKU: 8779-6726.

Package contents

1 × FPS PM05CF piston (carbon-loaded technopolymer + full metal rack 14T).

Label / SKU.

What you gain with this piston
A component that improves cycle responsiveness while preserving tooth durability: lighter moving mass for faster piston recovery, metal rack for reliable gear engagement and a geometry suited to tuned builds and workshop use.

Warnings & usage information (GPSR compliant)

Do not tamper with, modify or adapt the piston in any way: alterations may impair function, safety and compliance.

Ensure the replica is unloaded and springs are de-tensioned before installation; follow correct gearbox disassembly procedures or consult qualified technicians.

Use appropriate tools and correct torque values; avoid deforming the rack or piston body during fitment.

Confirm dimensional compatibility with your gearbox, sector gear and spring guide; incorrect assembly may cause malfunctions or damage.

Perform low-power functional checks after installation before operational use.

Avoid prolonged exposure to aggressive chemicals or excessive humidity; store in a dry place.

Dispose of materials and packaging according to local regulations.