UXR 300 AAC Blackout 10.5" Barrel Conversion Kit

Name: UXR 300 AAC Blackout 10.5" Barrel Conversion Kit
Brand: Primary Weapons Systems
Availability: OutOfStock

Primary Weapons Systems · Barrels

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Best price

$499.95at Brownells

Out of stock checked Oct 1, 2026

Buy at Brownells

Where to buy

Store	Price	Availability	Buy	Add to build
Brownells	$499.95checked Oct 1, 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

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Dashed line = out of stock. Tracking since Sep 28, 2026.

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Store	Latest	Lowest	Highest
Brownells	$499.95	$499.95	$499.95

Since Sep 28, 2026.

About this part

The UXR 300 AAC Blackout 10.5" Barrel Conversion Kit is a 10.5" 300 Blackout barrel from Primary Weapons Systems. One store lists it, Brownells at $499.95.

Fits and works with

Caliber: 300 Blackout · Shop matching ammo
Bolt: Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
Barrel length: 10.5" · Handguards

Specifications

Manufacturer: Primary Weapons Systems
Platform: AR-15
Caliber: 300 Blackout
Barrel length: 10.5"

From the manufacturer

The UXR Conversion Kit in 300 AAC Blackout with a 10.5" or 14.5" barrel offers shooters an effortless transition between calibers, thanks to the innovative XChange system. This groundbreaking system simplifies the process by allowing users to swap out the barrel, bolt, and magwell, enabling them to tailor their rifle to specific needs. Unlike other modular rifles on the market, the UXR Conversion Kit is both reasonably priced and readily available, ensuring accessibility for shooters seeking versatility without breaking the bank. Utilizing the intuitive dot system, users can seamlessly match corresponding dots on UXR components to ensure error-free transformations, further enh Mfg: Primary Weapons