Made of POM , for TM GLOCK17
We designed more thickness first , but the slide didn’t go back to the original position.
So we couldn’t set SAFETY. We redesigned to the same size of Marui original piston head.
Also we checked some O-ring position,it’ll be better to put it forwarder.
If O-ring worn out, you can exchange to new O-ring (P10)
Please use original screw to fix it.