CowCow Hop Up Bucking Combo (For Marui/WE GBB Series) we glock replacement part O-Ring at the end of

O-Ring at the end of threaded area for an improved seal

the manual winding system is built in front of the magazine for fast and easy operation in the mid-game

- Suitable for Tokyo Marui / KJ / WE M1911's

Spring Guide Stopper

CowCow Hop Up Bucking Combo (For Marui/WE GBB Series) we glock replacement part O-Ring at the end ofCCT HopUp busking is manufactured by high quality anti oil rubber material. It can prevent swelling, scratch and crash during the heavy usage. Its re designed entrance shape can better fit with nozzle movement to prevent jamming. Flared chamber allows BB feeding much smoother. The 70 60 50 options inside the package are able to enhance different level of spin velocity (70 Low 60 Middle 50 High) which is suitable for different shooting environment and