The AR-10A4 carbine is both rugged and flexible, perfectly suited to both military and law-enforcement duty. It is a gas-operated, magazine-fed, semi-automatic produced to provide a level of accuracy, dependability, and durability that is not found in other rifles of similar design. This firearm provides a perfect platform for all sighting options with its forged flattop receiver with Mil-Spec Picatinny rail and forward assist. The rifle's 16" manganese phosphated steel barrel is double-lapped, chrome-lined, and threaded and topped with a flash suppressor. Its aircraft-grade forgings have no die-cast or extruded parts in the receivers and all aluminum parts are hard-coat anodized per military spec. In addition, the AR-10A will now accept certain third party magazines in addition to ArmaLite's proprietary Waffle magazines, providing greater flexibility for shooters looking to gear up. Shipped with every AR-10A4 is: one Magpul Pmag 20-round magazine, a USMC quick adjustable sling, a sling swivel mount, and a black hard case. A limited lifetime warranty is included.