5.56 NATO 10.5" Pistol Medium Bbl Complete Upper Receiver

Name: 5.56 NATO 10.5" Pistol Medium Bbl Complete Upper Receiver
Brand: One Horse
Availability: InStock

One Horse · Upper Receiver

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5.56 NATO 10.5" Pistol Medium Bbl Complete Upper Receiver

Best price

$285.21at Kentucky Gun Co

In stock Lowest in 30 dayschecked Nov 13, 2026

Buy at Kentucky Gun Co

Compare 6 stores

Fits and works with

Caliber: 5.56 / .223 · Shop matching ammo
Bolt: Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
Gas system: Pistol · Handguards
Muzzle thread: 1/2x28 · Muzzle devices
Barrel length: 10.5" · Handguards

Specifications

Manufacturer: One Horse
Type: Complete
Platform: AR-15
Caliber: 5.56 mm NATO
Gas system: Pistol
Barrel length: 10.5"
Twist rate: 1:7
Thread pattern: ½ x 28

Where to buy

Store	Price	Availability	Buy
Kentucky Gun Co Best price	$285.21checked Nov 13, 2026	In stock	Buy at Kentucky Gun Co
OpticsPlanet	$299.99Salechecked Nov 12, 2026	In stock	Buy at OpticsPlanet
Battlehawk Armory	$252.52Salechecked 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
Brownells 17.76% off · ends Nov 15 · exclusions apply	$346.99checked Nov 13, 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

Show

Lowest in-stock price in the last 30 days: $285.21 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	$252.52	$252.52	$258.13
Brownells	$346.99	$346.99	$346.99
GrabAGun	$289.99	$289.99	$289.99
Kentucky Gun Co	$285.21	$285.21	$396.99
OpticsPlanet	$299.99	$299.99	$336.99

Since Sep 28, 2026.

About this part

The 5.56 NATO 10.5" Pistol Medium Bbl Complete Upper Receiver is an AR-15 complete upper receiver from One Horse. It's sold by 6 stores (2 in stock), from $252.52 to $346.99. The lowest in-stock price in the last 30 days was $285.21 at Kentucky Gun Co.

From the manufacturer

ONE HORSE 5.56 NATO COMPLETE UPPER RECEIVER W/MEDIUM PISTOL BBL FOR AR-15 Build a compact and highly maneuverable AR platform with this 5.56 NATO complete upper receiver, engineered for reliability, fast handling, and consistent performance in tight spaces. Fully assembled and ready to install, this upper is ideal for AR pistol or SBR configurations. At the core is a 5.56 NATO barrel paired with a pistol-length gas system, delivering reliable cycling in a compact format. This setup is optimized for shorter builds where responsiveness and maneuverability matter most. The 7" M-LOK free-float handguard enhances barrel stability for improved a Mfg: One Horse