MAS RHOP 2.0 + Concave Nub Installation Guide

MAS RHOP 2.0 Bucking and Concave Nub 1. Disassemble and clean the existing barrel group   A) Set the hopup dial to 0 and pop the arm pin out with a narrow punch. Push the arm away from the dial to unseat it. B) Use a small flat tool to pry the corner notch of the barrel c clip downwards to unlock the barrel. Remove the barrel with old bucking and clean as necessary with isopropyl alcohol.   2. Install Barrel + Bucking A) Apply a very small amount of thick (not runny) grease around the circumference near the barrel window without...