The WE Piston Lid or Piston Head O-Ring is a flared seal designed for WE gas blowback airsoft guns. Part WE13 will fit WE Hicapa or 1911 GBBs that use the metal piston head, and may fit other models.
This part will repair a leaky GBB and improve efficiency.
WE Piston Head O-Ring Part 13 Features:
-Flared Seal for performance
-Upgrades older standard o-ring
-Fits WE and Compatible GBB