MadBull 1 Black, 1 Clear Hop-up Bucking w/X Balancer

MadBull Airsoft Black rubber and clear silicone hop-up rubber buckings with X Balancer (fishbone x) spacers (2), two pack.

Comes with two hop chamber packings: one in rubber and one in silicone.
The rubber hop packing is very durable. The silicone packing, while more fragile than rubber, makes a better seal.

The package includes two (2) buckings and (2) hop-up spacers.