Sig Sauer MCX platform SBR configuration in .300 Blackout with 9-inch barrel, designed for maximum concealability with a folding stock and optimized subsonic performance. Type: Pistol Action: Semi-Automatic Caliber: .300 Blackout Capacity: 30 Year introduced: 2016, Germany Weight: 80 oz Overall length: 24" Status: Active Intended use: Suppressor Host, Home Defense, Tactical