The M4A2 features a fixed carry handle along with a slimline CAR-style stock for a much more compact rifle. A classic clamshell allows the rifle to have the full retro appearance. The rifle also features a chrome-lined bolt carrier improves cycling and increases corrosion resistance. The 50th Anniversary Edition features engravings on the magwell celebrating the legacy of Bushmaster. This model is chambered in 5.56x45mm NATO and includes one magazine.