ProWin Gas Route Bucking for Tokyo Marui / ProWin Model 17 / 18 Series

Air-tightness is the key to performance, the less gas wasted between the nozzle and the magazine, the better the performance, the ProWin Gas Route Bucking for Tokyo Marui / ProWin Model 17 / 18 Series is exactly the part that every Marui model 17 and model 18c owner should get. Just pop the two pins out on the top and replace it, done. Now you waste a lot less gas between the nozzle and the magazine during the operation.

Only fits Marui Model 17/ 18 GBB magazines and Prowin Model 17 magazine series.