CowCow TM Hi-Capa Blowback Housing Replacement O-Rings Kit

CowCow Replacement O-Rings Kit for Blowback Housing For TM Hi-Capa

CowCowTech includes 3 different sizes of O-Ring for the B01 Dynamic Blowback Housing, which will, in turn, fit the most common nozzles on the market. These O-Rings are oleophobic and reduce the friction during cycling.