AOE edition of the popular XT POM piston head.  Material is machined POM-H which has a slightly higher density, hardness and strength than regular POM-C material.  Comes with a Viton oring, aluminium core thread and thrust bearing.

Originaly was tested with 10,000 shots over various builds and showed zero damage. I highly recommend adding a drop of thread-lock on the screw.

Weight: 10g