The AR-22 M4 conversion upper is designed to give the look and feel of a center fire AR-15 M4 style rifle in a .22LR conversion. This conversion features a M4 style, 16.1” long barrel, mil-spec front sight post, and threaded end barrel with removable flash hider*. The AR-22 M4 is designed to use most mil-spec parts allowing the user to customize their rifle. As with all of our AR-22 conversions, it includes our CNC machined bolt assembly with 416 stainless steel bolt and precision ground tool steel guide rails for strength and smooth, reliable, functionality. In addition, the AR-22M4 includes a forged charging handle with our tactical latch. Each conversion is shipped with a 25 round Black Dog Machine magazine.