The Yankee Hill Machine sRx Long QD Flash Hider in 5/8×24 (Yankee Hill Machine 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 that keeps carbon off the threads. The 2.3-inch body is the longer of the sRx flash hider lengths. Yankee Hill makes it in the USA from 4140 steel with a black finish, and lists it for 9mm bores or smaller.

Key Specifications

• The muzzle thread is 5/8×24, one of the two thread pitches offered on the sRx flash hider.
• Overall length is 2.3 inches, the full-length sRx flash hider.
• Diameter is .9375 inch, a slim profile.
• Weight is 2.176 ounces, a light load at the muzzle.
• The material is 4140 steel, a strong alloy for repeated mounting.
• The finish is black, a low-glare coating.
• The caliber rating is 9mm (.390 diameter) or smaller, as stated by Yankee Hill.
• It adds 1.675 inches to a barrel with .6-inch threads.
• It must be paired with the sRx HUB QD Adapter on the suppressor.
• The sRx system needs no shimming or timing to the barrel.

Frequently Asked Questions

What does this flash hider have to be paired with? Yankee Hill says the sRx flash hider must be paired with its sRx HUB QD Adapter, which threads onto a suppressor with 1-3/8×24 HUB-compatible threads.

What bore size is it rated for? Yankee Hill lists the sRx flash hider for 9mm (.390 diameter) or smaller.

How much length does it add? The device is 2.3 inches long and adds 1.675 inches to a barrel with .6-inch threads.

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

The long sRx hider gives the rifle a proper flash hider when the suppressor is off, and an easy locking point when it is on. Order the 5/8×24 version from our Lubbock, Texas gun shop for fast, insured shipping, and see more suppressor parts and accessories while you are here.