CYMA CGS Enhanced M4 ZET System Gas Route Bucking 70 Degrees - 5 pcs

If you've got leaky M4 ZET system mags, these could help fix them up! The CYMA CGS Enhanced M4 ZET System Gas Route Bucking 70 Degrees - Set includes 5 gas route buckings/seals for TM ZET system M4 GBBR magazines constructed from 70-degree hardness rubber for temperature resistance and improvements in strength. Not only a handy spare to have on hand for anyone with TM ZET system M4 magazines, these gas route buckings can also help improve gas efficiency by reducing gas leakage between the magazine and nozzle, especially if you've installed a CGS nozzle or bolt carrier group into your TM. The CGS Enhanced M4 ZET System Gas Route Bucking is compatible with Tokyo Marui and CYMA CGS M4 magazines and should also fit the Double Eagle M4 ZET system magazines.