The Yankee Hill Machine sRx Mini QD Muzzle Brake 1/2×28 (brand 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 only 1.1 inches long it adds very little length and 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 barrel.
• The device is 1.1 inches long, which keeps the added length to a minimum.
• It adds only .475-inch to the barrel on barrels with .6-inch threads, according to Yankee Hill.
• The diameter is .9375-inch, a slim profile that stays close to the barrel line.
• It weighs just 1.024 ounces, light enough that you will not notice it on a carbine.
• The material is 4140 steel, a tough alloy steel that handles the pressure of a muzzle device.
• The finish is black, which matches typical rifle hardware.
• The bore opening is sized for 9mm (.390-inch) and smaller calibers, per the maker.
• The design is timeless, so no shim or clocking to the barrel is needed.
• There are no moving parts, and a taper in front of the threads gives consistent mounting.

Frequently Asked Questions

Do I need an adapter to mount a suppressor on this? Yes. Yankee Hill states that the sRx Mini Muzzle Brake must be paired with the sRx adapter (part no. YHM-4400), which attaches to suppressors with industry-standard 1-3/8×24 HUB threads.

Does it need to be timed or shimmed? No. The sRx system is timeless, so there is no shimming or clocking to the barrel.

What thread pitch is this version? This listing is the 1/2×28 version. Yankee Hill also makes the sRx Mini Muzzle Brake in 5/8×24, so match the pitch to your muzzle before you order.

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

Small, light and simple, this is the brake for a shooter who wants a quick-detach suppressor mount without a long muzzle device on the front of the rifle. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and browse more Class 3 parts and accessories while you are here.