Rock River Arms OP1500 LAR-15M 5.56 NATO 16″ 30+1

About this product

The Rock River Arms OP1500 LAR-15M Operator ETR is a 16-inch semi-automatic carbine built around a lightweight 13-inch M-LOK handguard and an extended charging handle for improved control. It is chambered for .223 Rem/5.56 NATO and ships optic-ready with a threaded barrel and A2 flash hider. The carbine includes an RRA 6-position NSP-2 stock, Hogue rubber beavertail grip, and a carrying case for transport and storage. Designed for range use, training, and general-purpose applications, the platform emphasizes familiar AR ergonomics and match-grade trigger performance.

Key Specifications

• The caliber is .223 REM/5.56 NATO.
• The barrel measures 16″.
• The rifle feeds from a 30 + 1 capacity magazine.
• The action is Semi-Auto.
• The overall length is 33″.
• The weight is approximately 6.40 lbs.
• The barrel is described as Threaded and fitted with an A2 Flash Hider.
• The trigger is a Two Stage Match unit.
• The stock is an RRA 6 Position NSP-2 in black.
• The twist rate is 1:9″.

This OP1500 LAR-15M blends practical ergonomics, match-oriented components, and modern accessory compatibility into a serviceable AR-style carbine. With its 16″ threaded barrel, optic-ready receiver, and quality RRA controls and furniture, it offers a dependable platform for range work, training, and duty-style applications where familiar handling and consistent performance matter.