CMMG MT 4140CM SBN 8.6 Blackout Threaded Barrel 12.5 inch. 6 Blackout Threaded Barrel. Established using some of the most extremely durable and dependable substances available these AR15 Barrels from CMMG will present you with something that gives you years of reliability. CMMG has been developing high quality products for a number of years and the CMMG MT 4140CM SBN 8.6 Blackout Threaded Barrel is their very own way of demonstrating exactly how much they are concerned. At OpticsPlanet we ensure that it is our obligation to receive the most suitable product for all of your requirements and presenting the CMMG MT 4140CM SBN 8.6 Blackout Threaded Barrel is a thing that we're happy to offer. Specifications for CMMG MT 4140CM SBN 8.6 Blackout Threaded Barrel: Manufacturer: CMMG Finish: Nitride Caliber: 8.6mm Blackout Threads per Inch: 5/8x24 Barrel Twist Rate: 1-3 Barrel Material: 4140 Chrome Moly Vanadium Package Contents: CMMG MT 4140CM SBN 8.6 Blackout Threaded Barrel CMMG 33D430C: MT 4140CM SBN 8.6 Blackout Threaded Barrel 12.5 inch