One Horse Firearms

AR-15 Rifle Builds

Shop an AR-15 rifle built in Brownstown, Indiana. One Horse AR-15 rifles in 5.56/.223, .300 Blackout and 6mm ARC, each with a 15-inch M-LOK handguard and Limited Lifetime warranty.

  • Limited Lifetime warranty
  • Ships to your FFL dealer
One Horse AR-15

One Horse Rifles

Mid-length, carbine and rifle-length AR-15 rifle options, including HBAR models. Ships to your FFL dealer.

An AR-15 rifle has a barrel of 16 inches or longer and a shoulder stock. One Horse makes them in three calibers: 5.56/.223 for the classic all-purpose AR-15, .300 Blackout for short-range, suppressor-friendly shooting, and 6mm ARC for longer-range and hunting. Choose a mid-length or carbine gas system, or an HBAR heavy barrel. Every One Horse AR-15 rifle is made in Brownstown, Indiana, comes with a 15-inch M-LOK handguard and a Limited Lifetime warranty, and ships to your FFL dealer.

  • Limited Lifetime warranty
  • 18+, or 21 where state or local law requires

Want a custom finish? See custom builds →

Buying online

How to Buy a Gun Online

  1. Pick your firearm and check out online.
  2. Choose an FFL dealer near you at checkout. We ship to them.
  3. Pick it up at the dealer with your photo ID and complete the background check.
See every step

Built in Brownstown, Indiana

American-made · Limited Lifetime warranty

Pick your rifle, choose your FFL dealer, and we’ll ship it there. Questions about a model? See our warranty or find a dealer near you.

Compare One Horse AR-15 rifles

RifleLineSKUCaliberBarrelTwistGasThreadPrice
16″ 5.56/.223 Mid-Length RifleOH-15OH-OG015.56/.22316″1:8Mid-length1/2×28
16″ 5.56/.223 Carbine RifleOH-15OH-OG025.56/.22316″1:8Carbine1/2×28
16″ 5.56/.223 Mid-Length HBAR RifleOH-15OH-OG055.56/.22316″1:8Mid-length1/2×28
16″ .300 BLK RifleOH-15OH-OG04.300 BLK16″1:7Pistol5/8×24
18″ 6mm ARC HBAR RifleOH-15OH-OG036mm ARC18″1:7.5Rifle-length5/8×24
16″ 5.56/.223 Custom “Gold”CustomOH-OG01-CUS5.56/.22316″1:8Mid-length1/2×28
16″ 5.56/.223 Custom Topographical EngravedCustomOH-OG01-CUS-25.56/.22316″1:8Mid-length1/2×28
16″ 5.56/.223 Custom CamoCustomOH-OG01-CUS-2-15.56/.22316″1:8Mid-length1/2×28
16″ 5.56/.223 Custom USA CamoCustomOH-OG01-CUS-2-35.56/.22316″1:8Mid-length1/2×28Notify Me When Available
16″ Express Rifle (Black)ExpressOHX-AI015.56/.22316″1:8Mid-length1/2×28
16″ Express Rifle (America 250)ExpressOHX-AI01-15.56/.22316″1:8Mid-length1/2×28
16″ Express Rifle (M81 Camo)ExpressOHX-AI01-25.56/.22316″1:8Mid-length1/2×28
16″ Express Rifle (OD Green)ExpressOHX-AI01-35.56/.22316″1:8Mid-length1/2×28
16″ Express .22LR RifleExpressOH-TT02.22LR16.1″1:12—1/2×28Notify Me When Available

Specs and prices from the live One Horse product pages and cards. Every standard and custom rifle has a 15″ M-LOK handguard.

Buying guide

Which AR-15 rifle?

Suppressors for OH-15 rifles

One Horse suppressors:

Plan B mount included.

Ryn .30 Cal SuppressorRyn .30 Cal SuppressorFor the 16″ .300 BLK and 18″ 6mm ARC rifles · 5/8×24
Ryn .30 Cal SuppressorRyn .30 Cal SuppressorFor the 16″ .300 BLK and 18″ 6mm ARC rifles · 5/8×24Available SoonNotify Me When Available
Ashe 5.56/.223 SuppressorAshe 5.56/.223 SuppressorFor 16″ 5.56/.223 OH-15 rifles · 1/2×28
Ashe 5.56/.223 SuppressorAshe 5.56/.223 SuppressorFor 16″ 5.56/.223 OH-15 rifles · 1/2×28Available SoonNotify Me When Available

One Horse suppressors are heavy duty, rugged and built with quality in mind. They aren't rated for full auto fire, but they're made to take abuse.

Suppressors ship to your dealer, and your dealer must hold an SOT. Once it arrives, you fill out a 4473 and take it home once approved.

AR-15 rifle questions

What AR-15 rifles does One Horse make?

Three lines: standard OH-15 rifles (16″ 5.56/.223 mid-length, carbine and HBAR, the 16″ .300 BLK rifle and the 18″ 6mm ARC HBAR), custom-finish 16″ 5.56/.223 rifles, and Express rifles with the Atrius FRS installed.

Which One Horse rifle is a 300 Blackout rifle?

The 16″ .300 BLK AR-15 Rifle (OH-OG04): 1:7 twist, pistol-length gas, a 5/8×24 muzzle thread and a 15″ M-LOK handguard.

What is the difference between the mid-length and carbine rifles?

Both are 16″ 5.56/.223 rifles with a 1:8 twist and a 15″ M-LOK handguard. The OH-OG01 uses a mid-length gas system and the OH-OG02 uses a carbine-length gas system.

What is the HBAR rifle?

The OH-OG05 is a 16″ 5.56/.223 rifle with an HBAR barrel profile, 1:8 twist and mid-length gas.

Do you make a 6mm ARC rifle?

Yes. The 18″ 6mm ARC HBAR Rifle (OH-OG03) has a 416R barrel, 1:7.5 twist, rifle-length gas and a 15″ M-LOK handguard. It pairs with the Ryn .30 cal. See the 6mm ARC page.

Which rifles have the Atrius FRS?

Only the Express rifles. They come with the Atrius FRS installed and tuned by One Horse. Standard and custom OH-15 rifles do not offer the FRS. Want to add your own selector or Forced Reset? See Forced Reset Ready™ rifles.

Which suppressor fits a One Horse rifle?

For the 16″ .300 BLK rifle and the 18″ 6mm ARC rifle, the Ryn .30 cal. For the standard 16″ 5.56/.223 rifles, the Ashe 5.56/.223. Both come with a Plan B mount included, and you fill out a 4473 at your dealer.

How old do I need to be to buy a rifle?

You must be at least 18, or 21 where state or local law requires it.

How do I get my rifle?

Order online and choose a dealer close to you at checkout. We ship to that dealer, and you pick it up there after your ID check and the required background check.

Does it ship free?

Orders of $399 or more ship free.

Is there a warranty?

Yes. One Horse rifles are backed by a Limited Lifetime warranty.

Join Our One Horse Waitlist We will inform you when your One Horse product is back in stock!
One Horse logo featuring a stylized horse head in white and red, symbolizing American-made firearms reliability.

Order Suppressors Online

Order your One Horse suppressor online at theonehorse.com and we ship it to your dealer. When it arrives, you fill out a 4473 at your dealer. Once approved, you take it home.