Yankee Hill 4445MB32 sRx Q.D. Muzzle Brake Short Black Phosphate Steel with 5/8"-32 tpi for sRx Adapters

The Yankee Hill sRx Q.D. Muzzle Brake is a short, low-profile brake designed to work with the YHM sRx suppressor mounting system. If you're building a rifle where you want minimal length and weight added to your setup—while still running a suppressor—this brake threads directly onto your barrel and accepts the sRx quick-detach adapter. It's built from 4140 steel with a black phosphate finish, so it'll hold up to field use without fussing over cosmetics.

The real appeal here is simplicity. The sRx system doesn't require shimming or timing to get right; the internal taper in front of the threads locks your suppressor in place with a consistent, gas-tight seal every time. That means no buildup of debris or gasses on the threads, and no guessing whether you've got it mounted correctly. The brake itself adds only 1.675 inches to your barrel (assuming standard 0.6" threads), so it won't transform your handling or balance.

This brake is purpose-built for the YHM sRx ecosystem—you'll need the sRx adapter to use it. That's the tradeoff for the streamlined design and ease of use. If you're already committed to the sRx system or planning to build one, this short brake is a natural fit for a compact, lightweight suppressed setup that's built to last.

Key Features

• Quick-detach mounting for sRx adapter system—no shimming or timing required
• Internal taper forms gas-tight seal to prevent thread fouling
• Minimal length (1.675" added to barrel) and weight for compact builds
• 4140 steel construction with black phosphate finish for durability
• No moving parts—straightforward, reliable design

Specifications

Frequently Asked Questions

What suppressor mount does this brake use?

The Yankee Hill sRx Q.D. Muzzle Brake is designed for the YHM sRx quick-detach system. You'll need to pair it with the YHM sRx Adapter to mount a suppressor. It is not compatible with other mounting standards.

How much length does this add to my barrel?

The brake itself is 1.6875" long and adds 1.675" to your barrel (measured on barrels with standard 0.6" threads). The total muzzle device length is 2.3".

Do I need to time or shim this brake to my barrel?

No. The sRx system is designed to work without shimming or timing. The internal taper and mounting geometry provide a consistent, gas-tight attachment every time.

What material and finish is this brake made from?

The brake is machined from 4140 steel and finished with a black phosphate coating for corrosion resistance and durability in the field.