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One Horse OH-15 .300 AAC Blackout 10.5" Barrel 30 Round KAK Brace
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$549.99
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SKU: OH-OP02-850078799807
Overview
Built around the familiar AR-platform, this pistol-format firearm is chambered in .300 AAC Blackout and configured with a 10.5-inch barrel for compact use where short-range performance and suppressed shooting are priorities. It offers a standard charging handle and mil-spec compatible components, giving experienced AR users a straightforward setup without an unfamiliar manual of arms. The included KAK pistol brace and 30-round magazine round out a package suited to hunters and outdoorsmen looking for a compact .300 BLK option for field carry, range work, or suppressed applications. Its black polymer and aluminum construction keeps the presentation simple and functional, with no unnecessary extras.
Why Hunters Choose the Onehorse
Ar-platform Semi-automatic
Action offers a familiar operating
10.5-inch Barrel
Suits compact .300 AAC Blackout
Designed Around
.300 AAC Blackout for short-range
Standard Charging
Handle supports intuitive manual operation
Mil-spec Compatible
Components help maintain a familiar
Key Features
- AR-platform semi-automatic action for a familiar operating setup.
- Chambered in .300 AAC Blackout for compact pistol-length use.
- 10.5-inch barrel configured for short-range and suppressed shooting applications.
- Standard charging handle and mil-spec compatible components.
- Pistol configuration with included KAK pistol brace.
- Includes one 30-round magazine; listed capacity is 30+1.
Best Used For
- Hunters wanting a compact .300 AAC Blackout pistol for short-range work and tight spaces.
- Shooters already familiar with the AR-15 platform who want a familiar, intuitive manual of arms.
- Users planning suppressed use with a 10.5-inch barrel in a pistol-length setup.
- Those needing a 30-round capacity option for range sessions or defensive-minded training.
- Hunters seeking a semi-auto pistol configuration with mil-spec compatible components and standard charging handle.
Specifications
| Action | Semi-Auto |
|---|---|
| Barrel Length | 10.5" |
| Blade Finish | Black |
| Brace | KAK Pistol Brace |
| Caliber | .300 AAC Blackout |
| Capacity | 30+1 |
| Included Magazines | 1x 30 Round |
| Material | Polymer, Aluminum |
| Model | OH-15 |
| Type | Pistol |
Pros
- AR-platform semi-automatic action offers a familiar operating system for experienced shooters.
- 10.5-inch barrel suits compact .300 AAC Blackout pistol-length configurations.
- Designed around .300 AAC Blackout for short-range use and suppressed applications.
- Standard charging handle supports intuitive manual operation.
- Mil-spec compatible components help maintain a familiar AR-15-style setup.
- Includes one 30-round magazine and a KAK pistol brace.
Considerations & Trade-offs
- The 10.5-inch barrel is tuned for compact .300 AAC Blackout use, so it is not intended to deliver the same longer-range performance associated with longer-barreled setups.
- This is a pistol-format AR-platform firearm with a KAK pistol brace, so it is configured differently than a traditional rifle and may not suit hunters looking for a shoulder-stocked setup.
- It is chambered in .300 AAC Blackout, which means ammunition selection and intended use should be matched to that cartridge rather than general-purpose rifle applications.
- The package includes one 30-round magazine, so additional magazines may be needed depending on how you plan to use it.
Suggested Comparisons
- Pistol-caliber AR-style firearms
- Compact .300 AAC Blackout firearms
- AR-platform pistols
- Suppressor-ready pistol-length carbines
Suggested Accessories
- AR-compatible sling
- Magazines
- Weapon light
- Pistol case
Frequently Asked Questions
What type of action does the One Horse OH-15 use?
It uses a semi-automatic AR-platform action.
What caliber is this pistol chambered in?
It is chambered in .300 AAC Blackout.
What barrel length is listed for the OH-15?
The listed barrel length is 10.5 inches.
What is the magazine capacity?
The listed capacity is 30+1, and one 30-round magazine is included.
Does this come with a brace?
Yes. The product listing includes a KAK pistol brace.