The Yankee Hill Machine sRx Mini QD Muzzle Brake in 1/2×28 (Yankee Hill Machine part no. YHM-4401-MB-28) is the shortest brake in YHM’s sRx quick-detach system, built for a sleek, low-profile suppressor setup. It threads onto a 1/2×28 muzzle and mounts a suppressor through the sRx taper interface with no shimming or timing to the barrel. At 1.1 inches long it adds very little length or weight to the rifle. Yankee Hill designed the sRx line around good looks and easy use, and it is made in the USA.

Key Specifications

• The muzzle thread is 1/2×28, the common AR-15 pitch, so the brake screws straight onto a standard muzzle.
• Overall length is 1.1 inches, the shortest sRx muzzle brake.
• Diameter is .9375 inch, a slim profile.
• Weight is 1.024 ounces, nearly unnoticeable on a carbine.
• The material is 4140 steel, chosen for strength.
• The finish is black, a low-glare coating.
• The caliber rating is 9mm (.390 diameter) or smaller, per Yankee Hill.
• It adds .475 inch to a barrel with .6-inch threads, very little extra length.
• It must be paired with the sRx HUB QD Adapter to mount a suppressor.
• The system needs no shimming or timing to the barrel.

Frequently Asked Questions

How much length does the Mini brake add? It is 1.1 inches long and adds .475 inch to a barrel with .6-inch threads.

What do I need to mount a suppressor on it? A suppressor with 1-3/8×24 HUB-compatible threads fitted with Yankee Hill’s sRx HUB QD Adapter. The brake must be paired with that adapter.

Does it fit 5.56 rifles? It is cut 1/2×28 and rated for 9mm (.390 diameter) or smaller, which is Yankee Hill’s published limit for the sRx muzzle brake.

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

When every fraction of an inch matters on a suppressed rifle, the Mini sRx brake keeps the muzzle device as short as the system allows. Order the 1/2×28 version from our Lubbock, Texas gun shop for fast, insured shipping, and browse more suppressor parts and accessories while you are here.