AR-15 Muzzle Thread Pitch: 1/2×28 vs 5/8×24
Close-up of a firearm barrel with a muzzle brake, showcasing precision engineering and durable materials.

AR-15 Muzzle Thread Pitch: 1/2×28 vs 5/8×24

Close-up of a firearm barrel with a muzzle device

Barrel guide · Thread pitch

Made in the U.S.A.

AR-15 Muzzle Thread Pitch: 1/2×28 vs 5/8×24

The muzzle thread on every One Horse barrel.

Quick answer

One Horse 5.56 NATO barrels are threaded 1/2×28. One Horse .300 BLK barrels are threaded 5/8×24.

Thread chart

Muzzle thread by One Horse barrel

BarrelCaliberMuzzle thread
7.5″ .300 BLK.300 BLK5/8×24
10.5″ .300 BLK.300 BLK5/8×24
16″ .300 BLK.300 BLK5/8×24
7.5″ 5.565.56 NATO1/2×28
10.5″ 5.565.56 NATO1/2×28
16″ 5.56 M45.56 NATO1/2×28
16″ 5.56 SOCOM5.56 NATO1/2×28

Specs from the One Horse barrel product pages.

The basics

1/2×28 vs 5/8×24

One Horse 5.56 NATO barrels are threaded 1/2×28. One Horse .300 BLK barrels are threaded 5/8×24. Match your muzzle device or mount to the thread on your barrel.

Suppressor mounts

See the Plan B mount guide for 3 prong mounts by thread, and the Ashe 5.56 suppressor or the Ashe product page; see also Ashe vs Ryn and how to buy a suppressor and Ryn .30 cal suppressor pages.

FAQ

Common questions

What thread pitch are One Horse 5.56 barrels?

1/2×28.

What thread pitch are One Horse .300 BLK barrels?

5/8×24.

Is the 16" .300 BLK barrel 5/8×24?

Yes. All One Horse .300 BLK barrels listed, 7.5", 10.5" and 16", are 5/8×24.

Questions? Email customerservice@theonehorse.com.

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