KUNG FU Airsoft Hop Up Bucking for Marui GBB
If your hop up adjustment is not having a significant effect on the hop up of your BB, your hop up packing is probably worn down
It is time to change a new one.
Packing has the tolerance against hot exhaustion that causes hardening and deterioration
Improve shooting accuracy, air-tightness & firmness
Suitable for Marui Airsoft Gas Gun / GBB Rifle models