The PWS UXR Elite Conversion Kit (Primary Weapons Systems part no. UXR-CK-300BLK-14) lets an existing UXR (User XChange Rifle) host switch to .300 AAC Blackout by swapping just three parts: the magazine well, bolt head, and this 14.5-inch barrel.

Key Specifications

• Brand: Primary Weapons Systems.
• Caliber: .300 AAC Blackout.
• Barrel length: 14.5 inches.
• Rate of twist: 1:6.
• System: UXR XCHANGE caliber-swap kit (magazine well, bolt head, barrel).
• Platform name: UXR, User XChange Rifle.
• Feature: bore-evacuation chamber built into the barrel.
• Gas system: modified long-stroke piston.

Frequently Asked Questions

Does a 14.5in barrel on this kit need NFA paperwork? Not by itself. This kit swaps the barrel/bolt head/mag well on an existing serialized UXR host rifle; building a new short-barreled rifle from scratch with a stock and a barrel under 16 inches requires prior ATF Form 1 approval.

What parts are included in this conversion kit? The magazine well, bolt head, and this 14.5-inch .300 AAC Blackout barrel.

Buy the PWS UXR Elite Conversion Kit, .300 Blackout, 14.5in

Get the PWS UXR Elite Conversion Kit, .300 Blackout, 14.5in from Primary Weapons Systems, browsable in our full Rifle Parts selection. Our Lubbock, Texas team ships fast, insured orders every day.