Rock River Arms 5.56 NATO 16" 31-Round AR Rifle

The Rock River Arms 5.56 NATO 16" 31-Round AR Rifle is a purpose-built platform designed for law enforcement, military training, and civilian tactical applications where reliability and modularity are non-negotiable. Built on the proven AR-15 architecture, this rifle delivers the accuracy and ergonomic control essential for precision work at tactical distances while maintaining the lightweight portability required for dynamic operations. The 16-inch barrel strikes the optimal balance between velocity retention, maneuverability in confined spaces, and sight radius—a configuration favored across professional and civilian marksmanship communities.

Rock River Arms' engineering emphasizes consistent quality control and corrosion-resistant finishes designed to withstand field conditions and frequent training cycles. The rifle's 16-inch barrel in 5.56 NATO delivers approximately 2,900 feet-per-second muzzle velocity with standard 55-grain ammunition, providing effective engagement capability to 300+ yards for trained operators. The modular AR platform allows immediate customization—rail systems, optics mounts, furniture, and aftermarket components integrate seamlessly, enabling end-users to optimize the platform for mission-specific requirements without extensive gunsmithing. At 16.55 pounds fully assembled, the rifle remains controllable under stress while providing sufficient mass for recoil management and stable shooting positions.

This rifle serves law enforcement patrol units, military training courses, reserve components, and serious civilian shooters who demand proven performance without compromise. The 31-round magazine capacity ensures extended engagement capability and reduced reload frequency during qualification courses or multi-target scenarios. Professional users across tactical disciplines—from SWAT qualification to military transition training—recognize Rock River Arms rifles for consistent lockup tolerances and field-proven durability through high round counts. Standard AR-15 upper and lower receiver compatibility means users can leverage existing accessories, replacement components, and upgrade paths already established within department or unit inventories.