Slong Airsoft "Airproof" Aluminum Piston Head for Airsoft AEGs

"Been teching my own airsoft guns since 2010

I will never use another piston head again.

This is the one. Previously I was pretty stuck on Maxx double o ring head, but for the air volume this can't be beat.

As stated in another review, take your O-ring and heat it up with either a blow dryer, heat gun, or just a lighter run around it a few times and let it cool before installation.

I've used countless different piston heads and I'll never go back to a different one

"Fantastic piston head, great machining, and a perfect air seal. When you get it out of the package, take the o ring off and stretch it over a cylinder. Heat it with a heat gun or blow-dryer and let it sit! It fixed the FPS issues I was having.

"The air seal that vomes with this piston head and this cylinder : https://www.evike.com/products/68361/ : is absolutely insane. Buy these parts with a double o-ring clinder head and you'll be all set for a while.