Piston-spring guide set for ARES AS-01 / AS-02 / AS-03 and compatible.

This set consists of:

- ZEROFRICTION double OR piston with central body machined from solid in POM (this is the part that touches the cylinder avoiding damaging it and ensuring a very low friction), front stop in UREPAN and final part (where the stop of the trigger group is hooked) in steel treated with TENIFER process, which ensures long life and less wear.

- Aluminum bearing spring guide specially designed for our piston.