The Bushmaster XM-15 Carbine provides heavy-duty performance whenever duty calls. The heavy profile chrome moly vanadium steel barrel is manganese phosphate-finished to insure protection against corrosion and rust, and the carbine features a threaded birdcage flash suppressor and a 6-position telescoping stock. The upper and lower receivers are machined from 7075-T6 aircraft aluminum forgings for light weight and added strength. The carbine ships with a chamber flag, sling, and a 30-round magazine. This model has a 16" barrel and the A2 upper receiver features a fixed carry handle and has a 300-800 meter rear sight system with 1 MOA elevation and 1/2 MOA windage adjustments.