Manufactured 100% in Italy, the FPS Softair PM04CF "ZERO-SHOCK" piston is designed for high-stress AEG builds. Its body is constructed from low-friction carbon-fiber-reinforced technopolymer, providing optimal strength while maintaining minimal weight. It features a full rack of MIM (Metal Injection Molding) steel teeth that have been thermal-treated for wear resistance, including a pre-trimmed 2nd tooth to optimize Angle of Engagement (AOE) out of the box. Compatible with standard Version 2 and Version 3 gearboxes.