Introducing the Daniel Defense M4A1 Upper Receiver, 223 Rem/556NATO, 14.5 Barrel (16 OAL with Pinned Brake), Carbine Length Gas System, 1:7 Twist, M4 12.0 Rail, Flat Dark Earth Finish, Fits AR 23-004-13150 from the renowned brand Daniel Defense. This high-quality upper receiver group is designed to enhance your AR15 experience. The FDE (Flat Dark Earth) color adds a sleek and tactical look to your firearm. Manufactured with precision and durability in mind, this upper receiver group ensures optimal performance and reliability. With its easy installation and compatibility with various AR15 models, it is a versatile choice for both professionals and enthusiasts. Upgrade your rifle with the Daniel Defense M4A1 Upper Receiver, 223 Rem/556NATO, 14.5 Barrel (16 OAL with Pinned Brake), Carbine Length Gas System, 1:7 Twist, M4 12.0 Rail, Flat Dark Earth Finish, Fits AR 23-004-13150 and enjoy superior performance on the range or in the field.