AAP-01 Piston Head

The TTI Airsoft Piston Head For AAP-01 is a new design lightweight piston head specially designed for use with HPA and high pressure propane or Green Gas. It has a thicker, reinforced rubber seal that will not fold or split in use with higher performance power setups.

Does not fit CowCow or CTM Blowback Units unless you also buy the
STALKER AAP-01 TTI Piston Head Screw For CowCow & CTM Blowback units
https://www.skirmshop.nl/en/aap-01-tti-piston-head-screw-for-cowcow-and-ctm-bl.html