Rock River Arms LAR-BT3 Varmint .308 Win 20+1, 20-inch

About this product

This Rock River Arms LAR-BT3 Varmint is a semi-automatic AR-pattern rifle chambered in .308 / 7.62 NATO designed for precision-oriented field and range use. It features a 20-inch stainless steel bull barrel with a 1:10 rate of twist that is cryogenically treated to promote consistent performance. The rifle uses a rifle-length gas system with a low-profile gas block and a 17-inch free-float M-LOK handguard for accessory flexibility. Ergonomic features include an OEM NSP-2 carbine stock and a Hogue overmolded rubber pistol grip.

Key Specifications

• Chambered for .308 / 7.62 NATO.
• Magazine capacity is 20 + 1.
• The barrel measures 20-inch and is stainless steel with a bull profile.
• Barrel twist rate is 1:10.
• The action type is Semi-Auto.
• Handguard is a 17-inch free-float M-LOK rail for modular accessory mounting.
• Stock supplied is an OEM NSP-2 carbine six-position stock.
• Pistol grip is a Hogue overmolded rubber grip for enhanced purchase.
• Trigger is an RRA two-stage match-style trigger.
• Overall length ranges between 37.25-inch to 39.75-inch depending on stock position.

Purpose-built components and a straightforward feature set make the LAR-BT3 Varmint a practical choice for shooters who prioritize accuracy and stability in a semi-automatic platform. With a heavy-profile stainless barrel, two-stage trigger, and a comfortable ergonomic layout, this rifle is well suited to varmint work, precision-focused range sessions, and other applications that demand consistent, repeatable performance.