MR. HOP is a hop-up bucking made of a mixture of silicone 50°, designed for the AEG series replicas.

This material tolerates low temperatures very well, without the Cold-Bore Shot effect - it does not require "warming up" to obtain a stable flight path and full range.
Works great in sniper rifles.
Thanks to the larger and wider surface of contackt with bb provides optimal spin - ideal for heavy balls.

The rubber has an additional sealing and stabilizing ring on the inside.
The barrel on which the rubber will be mounted must have a perimeter cut for this ring. Otherwise, the hop-up rubber will not fit properly to the barrel.