The Rock River Arms LAR-15M X-1 is a specialized version of RRA's AR-platform rifle built on their forged 7075-T6 aluminum receiver set with a hard coat anodized finish. The rifle features RRA's two-stage trigger system (4.5-5lb pull), chrome moly barrel with chrome lining, low profile gas block, and their distinctive X-series handguard system. Standard equipment includes a Beast muzzle brake, RRA CAR stock, and a full-length Picatinny rail for optics mounting. The X-1 model comes chambered in 5.56 NATO/.223 Remington with multiple barrel length options (16", 18", or 20"), featuring a 1:9 twist rate optimized for standard ammunition. The rifle utilizes RRA's free-float X-series handguard system which provides enhanced cooling and accessory mounting options. Each rifle includes a chrome bolt carrier group, standard charging handle, one 30-round magazine where legally permitted, and comes backed by Rock River Arms' warranty. The X-1's distinctive feature is its lightweight design while maintaining RRA's reputation for reliability and accuracy.