The Yankee Hill Machine sRx QD Flash Hider in 1/2×28 (Yankee Hill Machine part no. YHM-4405-28) is a quick-detach flash hider for rifles with a standard 1/2×28 muzzle thread. It is part of YHM’s sRx system, so a suppressor with the sRx adapter locks on through an internal taper seal and comes off just as easily. At 2.3 inches long it works as a flash hider on the bare rifle and as the suppressor interface. Yankee Hill makes it in the USA from 4140 steel, and rates it for 9mm bores or smaller.

Key Specifications

• The muzzle thread is 1/2×28, the standard AR-15 pitch.
• Overall length is 2.3 inches, a full-length flash hider profile.
• Diameter is .9375 inch, a slim profile that stays low.
• Weight is 2.176 ounces, light enough to leave on the rifle.
• The material is 4140 steel, chosen for strength and wear resistance.
• The finish is black, a low-glare protective coating.
• The caliber rating is 9mm (.390 diameter) or smaller, the limit Yankee Hill publishes.
• It adds 1.675 inches to a barrel with .6-inch threads.
• It must be paired with the sRx HUB QD Adapter to mount a suppressor.
• An internal taper seal locks the suppressor on and keeps carbon off the threads.

Frequently Asked Questions

Will this fit a standard AR-15 muzzle? It fits any barrel threaded 1/2×28, the standard AR-15 pitch, provided the bore is 9mm (.390 diameter) or smaller as Yankee Hill specifies.

Do I need anything else to mount a suppressor? Yes. The sRx flash hider must be paired with Yankee Hill’s sRx HUB QD Adapter on a suppressor with 1-3/8×24 HUB-compatible threads.

Does it need to be timed? No. The sRx system does not need shimming or timing to the barrel.

Buy the Yankee Hill Machine sRx QD Flash Hider, 1/2×28 Thread

This is the 1/2×28 flash hider for an sRx build, and it also does its job on a rifle that never sees a suppressor. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and browse more suppressor parts and accessories while you are here.