What is the difference between an AR 15 and a M16?
What is the difference between an AR 15 and a M16? The easiest way to look at it is this: Every M16 is an AR15, but not all AR15s are an M16. The most noticeable difference is that the civilian AR15 lower receiver does not have the third trigger pin hole for the auto sear above the safety selector. What type of gun is an M16? The M16 rifle, officially designated Rifle, Caliber 5.56 mm, M16, is a family of military rifles adapted from the ArmaLite AR-15 rifle for the United States military. The original M16 rifle was a 5.56×45mm...