AAC BLACKOUT FH 1X16LH 5.56 1/2X28

The AAC BLACKOUT FH 1X16LH 5.56 1/2X28 is a muzzle device built for shooters running suppressors on 5.56 rifles. Unlike many muzzle brakes designed primarily for aesthetics, this flash hider prioritizes the repeatable, rock-solid mounting that suppressors demand. It uses a modern taper-thread interface paired with 1x16 left-hand threads—a combination that locks in securely and stays there through extended shooting sessions, so your suppressor stays zero'd and your groups stay tight.

The 1/2x28 threaded base fits standard 5.56 barrels, and the precision taper interface ensures consistent headspace and concentricity every time you mount or remove your suppressor. If you're serious about suppressed shooting—whether you're hunting with hearing protection or running drills at the range—this is the kind of rock-solid foundation that pays for itself in reliability and repeatability.

The left-hand threads are worth noting if you're building a rifle or swapping muzzle devices; double-check your barrel before ordering to make sure the thread direction matches your setup.

Key Features

• 1x16 left-hand threaded taper-mount interface for secure suppressor mounting
• Precision taper geometry ensures consistent alignment and repeatable zero
• Built specifically for suppressed shooting, not just cosmetics
• 1/2x28 thread pitch compatible with standard 5.56 barrels
• Engineered for reliability under sustained firing schedules

Specifications

Frequently Asked Questions

Will this work with my 5.56 barrel?

Yes, if your barrel is threaded 1/2x28. The AAC BLACKOUT FH is designed for standard 5.56 rifles with this thread pitch. Verify your barrel's thread pattern and direction before purchase.

What's the difference between left-hand and right-hand threads?

Left-hand threads turn counterclockwise to tighten. Some AR-15s and other rifles use left-hand threads on the muzzle to prevent accidental loosening during shooting. Check your specific barrel; this device has 1x16 left-hand threads.

Is this just a flash hider or does it mount suppressors?

This is a suppressor mount. It's designed to accept a suppressor with a matching 1x16 taper-thread interface, not function as a standalone flash hider. The taper-thread design locks your suppressor in place securely.

What caliber and use is this for?

This device is built for 5.56 rifles with suppressor use in mind. Whether you're hunting with hearing protection or running suppressed training, it provides the repeatable mounting suppressors require.