Waldo Customs Hush Fill Valve O-Rings for Hi capa
Includes 5x Hush Fill Valve O-Rings.
Once these O-Rings are placed over your fill valve you will be able to silently fill your magazine without causing any gas spills. This is a renown inconvenience for some brands of GBBs, more specifically TM (but will work in competing brands).
Note: if you are not an experienced tech and would like someone to build it for you, please reach out to us here.