Yankee Hill 4405MB28 sRx Q.D. Muzzle Brake Long Black Phosphate Steel with 1/2"-28 tpi, 9mm, 2.30" OAL & 9.375" Diameter for sRx Adapters

The Yankee Hill sRx Q.D. 9mm muzzle brake is built for shooters who want a clean, low-profile suppressor mounting solution without the fuss of timing and shimming. This 1/2"-28 tpi brake integrates with Yankee Hill's sRx system—a modern quick-detach platform designed around the HUB industry standard—giving you a compact way to attach and remove a suppressor while keeping your rifle looking sharp and staying light on the barrel.

At just 2.30" overall length and weighing less than many competing Q.D. muzzle devices, the sRx brake adds minimal bulk to your setup. The black phosphate steel construction is tough enough for hard use, and the internal taper seal sits forward of the threads, locking your suppressor in place and sealing off the action—no gas or carbon buildup on the threads, no headaches field-stripping later. If you're running a suppressed 9mm and value a streamlined, no-nonsense design, this brake does the job.

The sRx system eliminates timing altogether; the large taper seat ensures consistent mounting every time you attach a compatible suppressor. That means faster, more reliable mounting than traditional shim-and-time setups, and fewer tools in your pack. Whether you're running a pistol-caliber carbine, a short-stroke rifle, or a dedicated 9mm platform, this brake plays well with the rest of the sRx ecosystem.

Key Features

• Quick-detach design compatible with Yankee Hill sRx suppressor mounting system
• Internal taper seal prevents gas and carbon buildup on threads
• No timing or shimming required—consistent mounting every time
• Low-profile, lightweight construction; minimal barrel extension
• Black phosphate steel; built for rigorous field use
• Permanent or removable barrel attachment option

Specifications

Frequently Asked Questions

What suppressors does this brake work with?

The sRx Q.D. brake is designed to mount Yankee Hill sRx-compatible suppressors via the HUB 1-3/8" x 24 threaded interface. It will not work with non-sRx suppressor mounting systems.

What barrels does this fit?

This brake is threaded 1/2"-28 tpi, the standard thread pitch for most 9mm and smaller-caliber rifle and pistol barrels. Verify your barrel's thread pitch and diameter before ordering.

Do I need to time this muzzle brake?

No. The sRx system eliminates timing. The large taper seat in front of the threads ensures consistent alignment without shims or rotational adjustment.

Can I permanently attach this to my barrel?

Yes. The sRx brake can be installed as a permanent fixture on your barrel or configured for quick detachment, depending on your setup and preference.