Over the past few months, I have completed several projects that involved putting optics on iron sight rifles. One of my M1A rifles, and now two of my ARs are wearing glass. This Bushmaster finishes off the list of projects, which is good, 'cause I am going broke. The Weaver 1.5-4.5X Classic Extreme scope was on sale at Natchez. The mount is the ARMS #2, the rings are ARMS #21 STANAG.