HM Defense HM15FMB556 5.56 NATO 16" 31-Round Rifle

The HM Defense HM15FMB556 5.56 NATO 16" 31-Round Rifle represents a modern tactical platform engineered for law enforcement, military, and civilian tactical operators who demand reliability under dynamic conditions. Built on the proven AR-platform architecture, this rifle delivers the accuracy and consistency required for precision shooting at intermediate distances while maintaining the ergonomic controls and modularity that define modern tactical rifles. The 16-inch barrel length strikes a critical balance between velocity retention and maneuverability, making this platform ideal for vehicle-based operations, close-quarters team entries, or patrol-ready deployment.

The HM15FMB556 is chambered in 5.56 NATO, the NATO-standard cartridge offering superior ballistic performance and barrier penetration compared to civilian .223 Remington rounds, with full military-spec reliability. The 31-round magazine capacity provides operational flexibility for extended engagements without frequent reloads, critical in high-stress scenarios where ammunition capacity directly impacts tactical response options. At 10.75 lbs unloaded, the rifle maintains a manageable weight profile that reduces shooter fatigue during extended operations while the 41.5-inch overall length ensures weapon handling control in confined spaces common to tactical deployments. The platform's flat-top receiver design accommodates modern optics and accessory systems seamlessly, enabling rapid customization to specific mission requirements.

Operators in LE/military environments and serious civilian tacticians will find the HM Defense HM15FMB556 responsive to mission-specific modifications through its standardized Picatinny rail ecosystem and AR-15 compatible parts ecosystem. The 5.56 NATO chamber accepts M855 duty rounds, M193 training ammunition, and commercial variants, providing ammunition flexibility across duty cycles and training evolution. Installation of optics, lights, or suppressor-ready muzzle devices requires only standard AR-15 mounting hardware and expertise; no gunsmithing necessary. Verify local and federal compliance before purchase, as regulatory requirements vary by jurisdiction.