The Silent Steel USA HUB Direct-Thread Mount, 1.375x.578-24 (brand part no. HUB_DT_1.375X.578X24) is a mounting adapter that lets any HUB-compatible Silent Steel USA suppressor thread directly onto a barrel with .578×24 muzzle threading, without a separate quick-detach mount in between. Silent Steel USA machines the adapter to convert the suppressor’s 1.375-inch HUB interface down to a direct-thread connection, keeping the setup simple for shooters who prefer permanent or semi-permanent mounting over quick-detach hardware. Among our silencers and suppressed firearms, this adapter suits owners of a HUB-based Silent Steel USA suppressor who are building a dedicated .578×24-threaded host.

Key Specifications

• The suppressor-side interface is Silent Steel USA’s 1.375-inch HUB thread.
• The barrel-side thread is .578×24.
• The mount type is direct-thread, with no quick-detach mechanism.

Frequently Asked Questions

Is this an NFA-regulated item? No. A thread adapter is a mounting accessory, not a firearm or suppressor component covered by the National Firearms Act, so it ships and transfers with no ATF paperwork.

Do I still need a Silent Steel USA suppressor to use this? Yes, this adapter only converts the mounting thread; it does not include a suppressor.

Can I switch back to a quick-detach mount later? Yes, since this adapter threads onto the same 1.375-inch HUB interface, you can swap it for a quick-detach HUB mount at any time.

Buy the Silent Steel USA HUB Direct-Thread Mount

A simple, direct-thread path from a .578×24 barrel to any HUB-compatible Silent Steel USA suppressor, this adapter keeps your setup uncomplicated. Order it from our Lubbock, Texas gun shop and we will get it to you as soon as it is ready to ship.