TacFire 10.5inch UNASSEMBLED .300 AAC PISTOL BUILD KIT BLACK
$309.99 at GunMag Warehouse · 7 stores
In stock
300BLK 16" Socom Pistol Bbl Complete Upper Receiver For AR15
No ratings yetBest price
$307.56at Kentucky Gun Co
In stock checked Nov 12, 2026
Fits and works with
- Caliber
- 300 Blackout · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
- Gas system
- Pistol · Handguards
- Muzzle thread
- 5/8x24 · Muzzle devices
- Barrel length
- 16" · Handguards
Specifications
- Manufacturer
- One Horse
- Color
- Black
- Type
- Complete
- Platform
- AR-15
- Caliber
- 300 Blackout
- Gas system
- Pistol
- Barrel length
- 16"
- Twist rate
- 1:7
- Thread pattern
- 5/8 x 24
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Kentucky Gun Co Best price | $307.56checked Nov 12, 2026 | In stock | Buy at Kentucky Gun Co | |
| OpticsPlanet | $309.99Salechecked Nov 12, 2026 | In stock | Buy at OpticsPlanet | |
| Battlehawk Armory | $276.13Salechecked Nov 12, 2026 | Check store | Buy at Battlehawk Armory | |
| GrabAGun | $289.99Salechecked Nov 12, 2026 | Check store | Buy at GrabAGun | |
| AR15Discounts 5% off | $299.99checked Nov 12, 2026 | Check store | Buy at AR15Discounts | |
| Dirty Bird | $299.99checked Nov 12, 2026 | Check store | Buy at Dirty Bird | |
| Brownells 17.76% off · ends Nov 15 · exclusions apply | $353.99checked Nov 12, 2026 | Out of stock | Buy at Brownells |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
Price history
Lowest in-stock price in the last 30 days: $293.89 at Kentucky Gun Co. Dashed line = out of stock. Tracking since Sep 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| AR15Discounts | $299.99 | $299.99 | $299.99 |
| Battlehawk Armory | $276.13 | $261.76 | $278.72 |
| Brownells | $353.99 | $353.99 | $353.99 |
| Dirty Bird | $299.99 | $299.99 | $299.99 |
| GrabAGun | $289.99 | $289.99 | $289.99 |
| Kentucky Gun Co | $307.56 | $293.89 | $310.44 |
| OpticsPlanet | $309.99 | $309.99 | $353.49 |
Since Sep 28, 2026.
About this part
The 300BLK 16" Socom Pistol Bbl Complete Upper Receiver For AR15 is an AR-15 complete upper receiver from One Horse. It's sold by 7 stores (2 in stock), from $276.13 to $353.99. The lowest in-stock price in the last 30 days was $293.89 at Kentucky Gun Co.
From the manufacturer
ONE HORSE 300BLK COMPLETE UPPER RECEIVER W/SOCOM PISTOL BBL FOR AR-15 Upgrade your rifle with a versatile 16" .300 Blackout complete upper receiver built for reliable performance, modular flexibility, and consistent accuracy. Designed to handle a wide range of shooting applications, this upper performs effectively with both subsonic and supersonic loads. At the core is a 16" .300 Blackout barrel paired with a pistol-length gas system, delivering reliable cycling-especially when running subsonic ammunition or suppressed setups. This configuration enhances function across various loads while maintaining smooth operation. The 15&qu Mfg: One Horse
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