The Krytac hop up bucking & nub for aeg is made of a very high quality silicone polymer, with a low liquid permeability (does not swell under the influence of moisture or oil). This ensures a very high consistency of the replica. The inside of the bucking is provided with multiple ridges which ensures an even contact surface resulting in an optimal backspin of the bb.

The bucking & Nub are OEM Krytac parts, but this bucking and nub can also be used as an upgrade part in an aftermarket Hop up system.