The PWS MK107 in .300 Blackout with 7.75-inch barrel is the most compact piston .300 BLK pistol available from a factory. The long-stroke piston system eliminates the back-pressure problems that plague ultra-short DI .300 BLK guns with suppressors. The 7.75-inch barrel is optimal for subsonic .300 BLK suppressed use, producing the most compact audibly hearing-safe suppressed configuration available from PWS. Type: Pistol Action: Semi-Automatic Caliber: .300 Blackout Capacity: 30 Year introduced: 2014, USA Weight: 62 oz Overall length: 18.5" Status: Active Intended use: Suppressor Host, Home Defense, Duty Use