LMT Monolithic 300 AAC Blackout 10.5" Pistol Length Bbl BLK
$554.40 at Brownells · 3 stores
In stock
Best price
$499.99at GunMag Warehouse
In stock checked Oct 1, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| GunMag Warehouse Best price | $499.99checked Oct 1, 2026 | In stock | Buy at GunMag Warehouse | |
| Brownells | $534.95checked Oct 1, 2026 | In stock | Buy at Brownells | |
| Battlehawk Armory | $499.95Salechecked Oct 1, 2026 | Check store | Buy at Battlehawk Armory | |
| Palmetto State Armory | $512.99Salechecked Oct 1, 2026 | Check store | Buy at Palmetto State Armory |
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: $499.99 at GunMag Warehouse. Dashed line = out of stock. Tracking since Sep 27, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Battlehawk Armory | $499.95 | $499.95 | $499.95 |
| Brownells | $534.95 | $534.95 | $534.95 |
| GunMag Warehouse | $499.99 | $499.99 | $499.99 |
| Palmetto State Armory | $512.99 | $512.99 | $512.99 |
Since Sep 27, 2026.
About this part
The UXR 300 AAC Blackout 14.5" Barrel Conversion Kit is a 14.5" 300 Blackout barrel from Primary Weapons Systems. It's sold by 4 stores (2 in stock), from $499.95 to $534.95. The lowest in-stock price in the last 30 days was $499.99 at GunMag Warehouse.
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
- 14.5" · Handguards
Specifications
- Manufacturer
- Primary Weapons Systems
- Platform
- AR-15
- Caliber
- 300 Blackout
- Barrel length
- 14.5"
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
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