Shoots great! This barrel loves a 110 grain bullet shooting 3 shot groups of 1” at 100 yards supported.
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One Horse Complete Uppers
16" .300 BLK AR-15 Complete Upper
5.0 (1 reviews)Built To Run™. 16″ 4150 SOCOM barrel. 15″ M-LOK handguard.
SKU OH-CU04UPC 850078799319
- Limited Lifetime warranty
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- Limited Lifetime warranty
- Ships in 2-3 business days
- Made in the U.S.A.
Questions before you buy? Call 812-200-0305 or email [email protected].
Build details
- Barrel16″ .300 BLK barrel, SOCOM profile, 4150, 1:7 twist, 5/8x24 thread, A2 muzzle device
- Gas systemPistol
- Handguard15″ free-float M-LOK
- BCGM16 Black Nitride bolt carrier group, installed
- Charging handleStandard charging handle, installed
- FitsAny mil-spec AR-15 lower receiver
Specifications
| Caliber | .300 BLK |
|---|---|
| Barrel length | 16 in. |
| Barrel profile | SOCOM |
| Barrel material | 4150 |
| Twist rate | 1:7 |
| Muzzle thread | 5/8x24 |
| Muzzle device | A2 |
| Gas system | Pistol |
| Handguard | 15 in. M-LOK, free-float |
| Bolt carrier group | M16 Black Nitride (included) |
| Charging handle | Standard (included) |
| Fits | Mil-spec AR-15 lower receivers |
| Manufacturer | One Horse |
| Country of origin | U.S.A. |
What owners say
5.0 (1 reviews)
Complete upper questions
Will it fit my lower?
Yes. It is built for any standard mil-spec AR-15 lower receiver.
Do I need an FFL to buy it?
No. A complete upper is not the serialized part, so it ships straight to you. Check your state and local law before you order.
Does it come with a BCG and charging handle?
Yes. An M16 Black Nitride BCG and a standard charging handle come installed. You can upgrade the BCG or charging handle in the add-ons above.
What ammo does it take?
It is chambered for .300 BLK. It runs both supersonic and subsonic loads.
When does it ship, and is there a warranty?
It ships in 2-3 business days. One Horse makes this upper and backs it with a limited lifetime warranty. See warranty details.
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Made in the U.S.A. Ships in 2-3 business days.
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Made in the U.S.A.FREE SHIPPINGLimited Lifetime warranty
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16″ .300 BLK AR-15 Complete Upper
MSRP: Original price was: $399.99.$349.99Current price is: $349.99.
16" .300 BLK AR-15 Complete Upper
SKU: OH-CU04
UPC: 850078799319
In stock
Description
Every One Horse rifle and component is made in America with uncompromising standards. We use U.S.-sourced materials, U.S. manufacturing, and strict quality control at every step. No shortcuts, no imported surprises — just dependable parts built by people who take pride in American craftsmanship. When you run One Horse, you’re running gear you can trust every single day.
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