Muddy Made to Fit Blind Kit Fitting Nexus and Partner Stand, Camo Create and customize your AR-15 your way with the CMMG, Inc Gas Block Assembly Constructed from heavy duty 4142 Chrome Moly Steel An ideal addition to your target rifle and a favorite among varmint hunters, the CMMG, Inc Gas Block Assembly Kit, Low Profile, 936 inch ID makes it possible to personalize your gun with your favorite optic or flashlight in an easy to install and easy to understand way