The Yankee Hill Machine sRx Mini QD Muzzle Brake (brand part number YHM-4401-MB-28) is cut with 1/2×28 threads and built as the muzzle-brake half of YHM’s sRx Quick Detach suppressor mounting system. An internal taper seals in front of the threads to lock a compatible sRx suppressor mount in place and keep gas and fouling from building up on the threads, and the brake must be paired with the YHM sRx Adapter (YHM-4400) to add quick-detach suppressor capability. YHM machines it from 4140 steel and finishes it in black phosphate, adding only 1.1 inches of muzzle device length and 0.475 inch to the barrel on guns using 0.6-inch threads. Because it never needs to be shimmed or timed to the barrel, it mounts once and stays put for repeatable, low-profile performance.

Key Specifications

• Functions as a QD Mini muzzle brake, the muzzle half of YHM’s sRx mounting system.
• Must be paired with the YHM sRx Adapter (YHM-4400) for quick-detach suppressor use.
• Internal taper seals in front of the threads, keeping gas and fouling off the threads.
• Machined from 4140 steel for durability.
• Finished in black phosphate.
• Threaded 1/2×28 for standard 5.56/9mm-class muzzles.
• Rated for 9mm (.390-inch diameter) or smaller bore calibers.
• Muzzle device length measures 1.1 inches, the most compact option in the sRx line.
• Adds only 0.475 inch to the barrel on guns using 0.6-inch threads.
• No shimming or timing to the barrel required for installation.

Frequently Asked Questions

Do I need anything else to use this with a suppressor? Yes, it must be paired with the YHM sRx Adapter (YHM-4400) for quick-detach suppressor use.

What calibers is it rated for? 9mm (.390-inch bore diameter) or smaller.

How much length does it add to the barrel? Just 0.475 inch on barrels with 0.6-inch threads, the shortest option in YHM’s sRx line.

Buy the Yankee Hill Machine sRx Mini QD Muzzle Brake – 1/2×28 Thread

Get the most compact muzzle end in YHM’s quick-detach sRx system. Order it from our Yankee Hill Machine lineup, part of our Class 3 parts and accessories selection, at our Lubbock, Texas gun shop for fast, direct shipping.