The Nomad and Primal ships with a 5/8"-24 adapter. You need this if you are going to direct thread with a 1/2"-28 threaded muzzle.
The universal 1.375"x24 "bravo style" threading to the suppressor end, allows the use of a wide variety of suppressors.
This model is made by Dead Air for their Nomad, Nomad Ti and other suppressors but will fit a host of different bravo style suppressors. The previous model, KA-301 was made of titanium and then blackened. This model is made of steel and nitrided. To lighten the weight, the interior hex head on the barrel threads was removed.
Manufacturer's Part Number LT-301