HM Defense 16MBUP556 MonoBloc Upper 223 Rem, 5.56x45mm NATO 16" Black Cerakote Barrel, 7075-T6 Aluminum Black Anodized Receiver, 15" M-LOK Free-Float Handguard for AR-15

The MonoBloc Upper features a HM barrel with an integral machined patented gas block, and a carbine gas system. It is also 4150 Chromoly, match grade, tripled honed, and button rifled. Its handguard is free-floating and uses a Picatinny rial, Magpul M-LOK, and machined from 6061-T6 aluminum. Upper and Lower receiver are made of 7075-T6 aluminum with a hard coat anodized finish. The MonoBloc Upper also includes a patented HMB bolt, Mil-Spec components, charging handle, and a dust cover with an American Flag.