HUX DIRECT THREAD ADAPTER M13.5X1 LH

The Huxwrx HUX Direct Thread Adapter M13.5X1 LH is a precision muzzle device mounting solution built for shooters running fixed-barrel systems with suppressors. If you're looking to attach a can to a barrel with M13.5X1 left-hand threading, this direct-thread adapter bridges the gap between your barrel's threads and a suppressor with 1.125X28 threads, giving you a solid, no-rotation mount without the bulk of a traditional brake or flash hider.

Engineered from 17-4 stainless steel and hardened with a black nitride finish, this adapter is built to handle the rigors of sustained shooting. The material and finish combo resists both wear from repeated installation and removal cycles, and corrosion from environmental exposure and suppressor condensation. The wrench flats are compatible with the RAD 9 & 45 wrench, so you can install or service it with the proper tools and won't strip the adapter turning it on or off.

Important: this adapter is designed exclusively for fixed-barrel systems. Do not use it on unlocking or reciprocating barrels, where the extra leverage and mass of a direct-thread setup can cause reliability and safety issues. If your barrel cycles, you need a different mounting solution.

Key Features

• Direct-thread design for suppressor attachment to M13.5X1 LH barrel threads
• Bridges M13.5X1 LH threads to 1.125X28 suppressor interface
• 17-4 stainless steel construction with black nitride hardening for durability and corrosion resistance
• RAD 9 & 45 wrench-compatible flats for repeatable, controlled installation
• Fixed-barrel systems only—not for use on unlocking or reciprocating barrels

Specifications

Frequently Asked Questions

Will this adapter work on my reciprocating bolt-action or semi-auto rifle?

No. The HUX Direct Thread Adapter M13.5X1 LH is designed for fixed-barrel systems only. Do not use it on unlocking or reciprocating barrels, as this can create reliability and safety issues.

What suppressor threads does this adapter accept?

The adapter converts your M13.5X1 LH barrel threads to a 1.125X28 suppressor interface, so it is compatible with suppressors that have 1.125X28 threads.

What do the wrench flats do?

The RAD 9 & 45 wrench flats allow you to install and remove the adapter with the proper wrench tool, ensuring you apply controlled torque without stripping the wrench flats or cross-threading the adapter.

How durable is the nitride finish?

The adapter is made from 17-4 stainless steel that is heat-treated and finished with black nitride for improved wear and corrosion resistance. This finish is designed to protect the adapter from repeated installation cycles and environmental exposure.