The Yankee Hill Machine sRx Long QD Flash Hider 5/8×24 (brand part no. YHM-4405-24) is a full-length quick-detach flash hider for barrels threaded 5/8×24. It belongs to YHM’s sRx system, so a suppressor fitted with the sRx adapter locks onto it through an internal taper seal. The 2.3-inch body is the longer of the two sRx flash hider lengths in this thread pitch. Yankee Hill makes it in the USA from 4140 steel with a black finish.

Key Specifications

• The muzzle thread is 5/8×24, a common pitch on .308-class rifles.
• The body is 2.3 inches long, the full-length sRx flash hider.
• It adds 1.675 inches to the barrel on barrels with .6-inch threads, according to Yankee Hill.
• The diameter is .9375-inch, which keeps the muzzle profile slim.
• It weighs 2.176 ounces, light for a quick-detach mount.
• The material is 4140 steel, a tough alloy suited to muzzle devices.
• The finish is black, matching typical rifle hardware.
• The bore opening is sized for 9mm (.390-inch) and smaller calibers, per the maker.
• The mount is timeless, so no shim or clocking is needed.
• An internal taper seal before the threads locks the device to the adapter and contains carbon buildup.

Frequently Asked Questions

What is the difference between the Long and Short sRx flash hiders? The Long is 2.3 inches long and adds 1.675 inches to a barrel with .6-inch threads. The Short is 1.8125 inches long and adds 1.175 inches.

What suppressor interface does it use? The sRx system. Yankee Hill specifies that the flash hider must be paired with the sRx adapter (part no. YHM-4400), which fits suppressors with industry-standard 1-3/8×24 HUB threads.

Which muzzle thread does this version fit? It is the 5/8×24 version. Yankee Hill makes this flash hider in 1/2×28 too, so confirm your muzzle thread before ordering.

Buy the Yankee Hill Machine sRx Long QD Flash Hider 5/8×24

A long, quick-detach 5/8×24 flash hider is a good fit for a rifle that moves between suppressed and unsuppressed use. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and see more Class 3 parts and accessories while you are here.