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16MBUP-556-L by HM Defense: A specially designed MonoBloc Upper is incorporated into the design, which includes an HM barrel with a patented and integral gas block. This product's gas system is specifically designed for carbines. The piece is composed of 4150 Chromoly and is match-grade, with triple honing and button rifling for optimal quality.
The handguard, created to be free-floating, comes with a Picatinny rail and a Magpul M-LOK, all formed from 6061-T6 aluminum for strength and longevity. Both the Upper and Lower receivers are made from 7075-T6 aluminum, using a hard coat anodized finish for durability.
There's more to the MonoBloc Upper, too. It houses a patented HMB bolt, strictly adheres to Mil-Spec components, includes a charging handle for convenience, and possesses a dust cover delicately embossed with an American Flag for a patriotic touch.