Polishing Internals - Sandpaper Method

*Thank you MONITOR for the original how to* This link details the steps taken and the results: http://www.a5og.net/5-internals/20113... In this video I show you how to Polish your Internals using the sandpaper method. Polishing the internals will allow smoother operation of the internal parts(front bolt, rear bolt). It will prolong the life of your o-rings, increase your fps, and even quite your marker to some extent.