The MCX Virtus in .300 Blackout combines the MCX platform's piston reliability with the optimal suppressed subsonic round. The MCX's piston operating system — unlike direct-impingement AR-15s — runs cleanly with subsonic .300 BLK loads that generate less gas volume, avoiding the cycling issues that plague DI-AR conversions with subsonic ammunition. Factory-ready for suppressor use with adjustable gas block. Type: Rifle Action: Semi-Automatic Caliber: .300 AAC Blackout Capacity: 30 Year introduced: 2016, USA Weight: 6.4 oz Overall length: 35" Status: Active Military use: Yes Intended use: duty, hunting, suppressor_host