The CSAT (Combat Shooting and Tactics) variant was developed in collaboration with Paul Howe of CSAT — a tier-one veteran and instructor. Features an enhanced trigger guard, ambi selector, 16-inch chrome-lined barrel, and RRA's two-stage NM trigger. The collaboration brought credibility from a legitimate combat operator. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2007, United States Weight: 100.8 oz Overall length: 32.5" Status: Active Intended use: Law Enforcement, Home Defense, Competition