The Rock River Arms LAR-15M Assurance series includes several variants (Assurance-C, Assurance-M, Assurance-UTE) built on RRA's forged 7075-T6 aluminum receiver set with a hard coat anodized finish. These models feature RRA's custom-contoured chrome moly barrel with chrome lining, their signature two-stage trigger system (4.5-5lb pull), and a specialized RRA Assurance handguard system. Standard equipment includes a low profile gas block, RRA Beast muzzle brake, RRA CAR stock, and a full-length Picatinny rail for optics mounting. The Assurance line comes chambered in 5.56 NATO/.223 Remington and is available in multiple barrel length configurations (16", 18", or 20"), depending on the variant. The rifles feature a 1:9 twist rate, chrome bolt carrier group, and RRA's proprietary Assurance free-float handguard system designed for enhanced heat dissipation and accessory mounting options. Each rifle includes one 30-round magazine where legally permitted and comes with Rock River Arms' warranty. The Assurance series combines RRA's proven reliability with enhanced ergonomics and customization options through its various models.