The Ready Series AR-15 Rifle is the foundational offering of the Ready Series. It combines all of the durability and reliability the Ready Series is known for with streamlined features. Featuring a 16" nitride barrel chambered in 5.56 NATO, and a 15" MLOK rail, the Base Rifle is ready for your optic of choice and a lifetime of reliable service. At ZRODelta, hard working Americans manufacture, assemble, and test each Base Rifle with pride. Specifications and Features: Action: Semi-Auto Caliber: .223 Wylde, .223 Remington, 5.56 NATO Capacity: 30 + 1 Magazines: One Barrel Length: 16 Inches Grip: A2 Safety: Two Position Muzzle Device: A2 Flash Hider Gas System: Mid-Length Color: Black