SPS Tactical AAC-SD (Advanced Armament Corporation Suppressor Direct) — threaded barrel, H-S Precision stock, and 20" barrel purpose-built for suppressed precision work. Remington's collaboration with AAC. Type: Rifle Action: Bolt-Action Caliber: .308 Win Capacity: 4 Year introduced: 2011, United States Weight: 8.5 oz Overall length: 40" Status: Discontinued Intended use: Tactical, Target Shooting