Madbull Shark Hop Up Rubber

The Madbull Shark Hop Up Rubber is a quality bucking and there are 2 buckings in the package, one rubber (black) and one Silicone bucking (transparent).

Also included with this bucking is the "fishbone" nub. These 2 buckings are especially good to use on bb weights 0.20 - 0.30gr. Heavier bb's, as for instance in a DMR, are not recommended as the bucking will wear out/shape quite quickly due to the high forces released in a DMR.