ProWin 5.5 X 1MM O -Ring for Prowin Model 17 & 18 / Hi-Capa / MWS M4A1 GBB Gas Magazine

The ProWin O-ring for the TM G series model 17 & 18, Hi-Capa series, and M4 MWS magazines is designed to take the prolonged pressures of green gas.

Compatibility:

Tokyo Marui G Series Model 17

Tokyo Marui G Series Model 18

Tokyo Marui Hi-Capa Series

Tokyo Marui M4 MWS GBBR

Includes:

x3 ProWin 5.5 X 1MM O -Ring for Prowin Model 17 & 18 / Hi-Capa / MWS M4A1 GBB Gas Magazine

Disclaimer: All aftermarket upgrade parts require necessary skill or modification to install and assemble, please consult with your airsoft technician if needed.