How To Zero The AR15A4 / M16A2 / M16A4: Dial In The Rear Drum For Distance
This video provides a comprehensive guide to zeroing and utilizing the A2/A4 rear sight drum on AR-15 and M16 platforms. It details how to calibrate the elevation drum using a 1/16 inch Allen key and explains the function of the dual apertures for different ranges. The demonstration covers achieving a 25-yard zero for a standard military configuration and testing the sight's effectiveness at longer distances.









