Top-of-the-line tactical Model 500 outfitted with various features from Advanced Technology International Co. (ATI). Including 6-position stock with adjustable cheek, Scorpion rear pad and grip, ATI Halo Heatshield, two 2" accessory rails and removable top rail, and three add-a-shell units that mount in nine different positions on the gun. Model 500 features include an ambidextrous safety, dual extractors, twin action bars and anti-jam elevator. Introduced in 2016, with limited availability only through a Talo Group distributor.