Piston head precisely manufactured from aluminum by APS. The design is equipped with 6 air supply holes on the front. The air flow created during the firing process presses the internal O-ring firmly against the cylinder through the holes. This feature ensures a reliable and high seal, meaning very little to no air escapes. The compressed air is then transferred directly to the inner barrel via the cylinder head and the nozzle.

There is a ball bearing on the back that prevents the spring from being misjudged or jammed when firing at a faster rate.