RUBBER HOPUP HULK ESCW (ESC-HULK)

Hulk hopup rubber Rubber with a hardness of about 65shore Suitable for any environmental condition, for any power and any propulsion (spring- co2- hpa) Gives an optimal trajectory to the pellet ensuring a constant backspin throughout the entire trajectory Standard hump but with above average contact area, very easy to install and compatible with EVERY barrel