Dead Air HUB Fixed Mount A fixed mount insert engineered to expand suppressor compatibility across a wider range of firearms by providing a direct thread interface for HUB compatible suppressors with a 1.375-24 hub thread. Machined from 4140 heat-treated alloy steel for strength and durability, the mount measures 0.765 inch in length and uses an M18X1.5 thread pattern to deliver secure, repeatable engagement. Finished with QPQ black nitride for enhanced corrosion resistance and longevity, the mount weighs 1.92 oz and is configured for direct thread use with Nomad, Primal, Lazarus 6, Sandman X and other HUB compatible silencers.