
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
| Barrel | Caliber | Muzzle thread |
|---|---|---|
| 7.5″ .300 BLK | .300 BLK | 5/8×24 |
| 10.5″ .300 BLK | .300 BLK | 5/8×24 |
| 16″ .300 BLK | .300 BLK | 5/8×24 |
| 7.5″ 5.56 | 5.56 NATO | 1/2×28 |
| 10.5″ 5.56 | 5.56 NATO | 1/2×28 |
| 16″ 5.56 M4 | 5.56 NATO | 1/2×28 |
| 16″ 5.56 SOCOM | 5.56 NATO | 1/2×28 |
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.

