Rock River Arms 5.56 NATO 10.5" 31-Round Threaded Barrel Rifle

The Rock River Arms 5.56 NATO 10.5" 31-Round Threaded Barrel Rifle represents a purpose-built platform for tactical professionals and dedicated shooters who demand a compact, reliable system without compromising on firepower or modularity. Purpose-designed for close-quarters operations, home defense, and high-risk entries, this rifle delivers the ergonomic controls and magazine capacity expected in modern tactical workflows. The 10.5-inch barrel provides the velocity floor needed for 5.56 NATO duty rounds while maintaining a profile short enough for vehicle operations, room clearing, and confined-space engagements where full-length rifles become liabilities.

Rock River Arms engineers this rifle on a direct-impingement platform proven through thousands of operational cycles in law enforcement and military service. The threaded barrel—a critical feature for sound signature management and ballistic optimization—accepts industry-standard 1/2x28 muzzle devices, allowing users to specify suppressors, compensators, or flash hiders based on mission requirements. At 9.12 lbs, the rifle balances sufficient mass for recoil management and thermal stability during sustained fire while remaining light enough for extended tactical carry. The 31-round magazine capacity ensures adequate firepower reserves typical of modern defensive carbines, reducing reload frequency during high-stress incidents and maximizing engagement window in multi-threat scenarios.

Law enforcement tactical teams, armed security professionals, and civilian end-users practicing modern defensive rifle disciplines will find this Rock River Arms configuration immediately actionable without additional investment in caliber conversion or major component swaps. The 5.56 NATO chambering delivers broad ammunition compatibility across commercial and military-spec sources, critical for departments managing logistics across multiple platforms. Installation of a suppressor or muzzle brake onto the threaded barrel requires no gunsmithing—simply hand-tighten or use a wrench, depending on manufacturer specifications and local regulations. This rifle integrates seamlessly into existing 5.56 ammunition supply chains and is compatible with standard AR-15 aftermarket furniture and optic mounts, ensuring long-term parts availability and user customization options.