Hm Upper 16" 5.56 15" Mlok Blk

The HM Defense Upper 16" 5.56 15" M-Lok Black upper receiver assembly represents a purpose-built platform designed for shooters who demand precision and reliability in demanding environments. Built on HM Defense's proven architecture, this upper combines a patented MONOBLOC barrel with integrally machined gas block—a design that eliminates the traditional separate gas block mounting, reducing potential leak paths and enhancing overall system rigidity. The 16-inch barrel in 5.56 NATO delivers velocity and accuracy suitable for both intermediate-distance engagement and precision rifle training, while the 15-inch free-float M-Lok rail provides tactical flexibility for mounting optics, lights, and other accessories without inducing point-of-impact shift.

The upper features HM Defense's patented HMB bolt design, which replaces the standard cam pin hole with a cam pin socket and tapered cam pin geometry. This refinement improves bolt lockup consistency and reduces wear on the receiver extension, extending component service life. The free-float configuration with both Picatinny and M-Lok mounting slots accommodates a wide range of modern handguard accessories and forward-mounted systems. At 5.06 lbs, the upper strikes a practical balance between structural integrity and handling characteristics, critical for both precision work from supported positions and dynamic shooting drills.

This upper receiver suits operators and serious enthusiasts building or upgrading duty-grade AR-15 platforms. Law enforcement agencies, competitive shooters, and trained civilians running intermediate-range engagements or precision drills benefit from the design's focus on accuracy and mechanical durability. The combination of short-stroke gas system integration and free-float rail eliminates common accuracy variables, allowing the shooter to isolate performance to ammunition and marksmanship. Whether configured for patrol duty, range validation, or precision rifle applications, this upper delivers the platform consistency that professional and semi-professional users expect.