Introducing the Advanced Armament Co (AAC) HUB Adapter. This HUB mount installs in the rear of the suppressor and provides the mating interface for AAC's 1x16 LH taper-thread muzzle devices. Simple, secure, and repeatable this is the mounting solution designed to keep suppressors locked in place under real use. Features1x16 Left-Hand Internal ThreadsPrecision Taper LockupHub Compatible.Threaded, Not LatchedBuilt for Real UseSecure Under Heat and FireEasy On, Easy Off