The WE Piston Head is a metal blowback chamber piston head designed for WE gas blowback airsoft guns. Part WE12 will fit WE Hicapa or 1911 GBBs, and upgrades the old o-ring piston head design to the new version.
This part will repair a leaky GBB and improve efficiency.
WE Piston Head Part 12 Features:
-Upgrades older standard o-ring
-Fits WE and Compatible GBB