The B Dapter HUB Mount is CMMG's Plan B suppressor mounting system, compatible with 1.375"-24 HUB threaded suppressors and Q Plan B or Plan B pattern muzzle devices. B Dapter/Plan B QD attachment system allows for a simple, lightweight, and secure suppressor mount. The inner taper seal prevents carbon fouling on the mount and muzzle device threads and securely mates the two together, requiring more force to remove than it does to install, this ensures your suppressor won't back off of the muzzle device as well. Installation is easy with 1-1/8" (1.125") wrench flats, no proprietary tools are needed. Features1.375"-24 HUB Mount: The B Dapter HUB mount is compatible with Bravo-style 1.375"-24 threaded suppressor bodies.Plan B Muzzle Device Compatible: Compatible with CMMG RBB, SVB, and other Plan B-pattern muzzle devices.Nitride Finish: Durable nitride finish that resists corrosion and carbon fouling.