MK18 configuration chambered in 300 Blackout with 10.3-inch barrel. Combines the ultra-compact MK18 form factor with the suppressor-optimized 300 BLK round. Type: Pistol Action: Semi-Automatic Caliber: 300 Blackout Capacity: 10 Year introduced: 2018, USA Weight: 96 oz Overall length: 23.5" Status: Active Intended use: Tactical, Law Enforcement, Home Defense