Rock River Arms SOC0820V1 | .458 SOCOM | 16-inch Upper

The Rock River Arms SOC0820V1 LAR-15M CLB is a complete AR-15 upper assembly chambered in .458 SOCOM. It features a 16-inch chrome moly bull barrel, a 13-inch M-LOK free-float handguard, and RRA’s Beast Brake muzzle device. The upper ships with a bolt carrier group and charging handle assembly and fits standard AR-15 lowers.

Product Specifications

• The brand is Rock River Arms.
• The model/part number is SOC0820V1.
• The caliber is .458 SOCOM.
• The upper receiver is a forged A4 design.
• The barrel is a 16-inch chrome moly bull configuration.
• The barrel description is a bull profile for enhanced rigidity.
• The muzzle device is a RRA Beast Brake with 5/8×32 threads.
• The gas system uses a low profile gas block.
• The handguard is a RRA lightweight aluminum free-float rail in an extended 13-inch length.
• The handguard interface is M-LOK compatible.
• The finish type for major components is Black.
• The product type is listed as a Complete upper assembly.
• The package includes a bolt carrier group and charging handle assembly.
• The UPC is 842834101306.

This upper is built for shooters who need a heavy-for-caliber .458 SOCOM configuration on an AR-15 platform. Its 16-inch bull barrel and free-float M-LOK handguard provide a stable, repeatable platform well suited to applications such as big-game hunting in thick cover and specialized heavy-bullet target work where controlled handling and robust construction matter. The included bolt carrier group and charging handle make it a practical choice for integration onto a variety of AR-15 lowers.