Dead Air created the hub mount. This device fits the threads of a barrel with 3/4-20 pitch and inserts into the backend of a standard or universal (hub) suppressor with a 1.375"-24 thread. It is compatible with a large number of modern suppressors, which use the "bravo" or "universal" hub mount, like the Dead Air Sierra 5, the Nomad and the Primal in the Dead Air line-up.