These Krytac Soft hop-up bucking & nub for AEG are made of a high quality nonporous silicone polymer with, as it’s called, low liquid permeation characteristics. Or simply put: it’s nice and soft rubber that won’t swell because of air humidity, oil or cleaning agents, which does wonders for the consistency of an airsoft replica. Besides that, the bucking features three internal ridges for an even grip and uniform spin of the BB’s which, also, dramatically improves accuracy.

The Krytac Soft hop-up bucking & nub for AEG are OEM Krytac replacement parts, but they can also be used as aftermarket bucking & nub for other hop-up systems