Is it compatible with standard AR-15 parts?

No, the UXR upper and lower receivers, handguard, and bolt carrier group are proprietary PWS designs. However, it uses a standard Mil-Spec AR-15 fire control group (trigger), and the buffer tube is compatible with many aftermarket AR stocks, though the folding mechanism is specific to the UXR system.

Does the pinned and welded muzzle device make it a permanent 16-inch barrel?

Yes. The 14.5-inch barrel has a 2.5-inch extended FRC compensator permanently attached via pin-and-weld, bringing the total legal barrel length to 16 inches. This configuration is legally a rifle, not a Short-Barreled Rifle (SBR), and does not require a $200 NFA tax stamp or ATF Form 1 to own, assuming you are not modifying the barrel assembly.

How long does shipping to an FFL take?

For in-stock items, Ironclad Armory processes and ships within 2 business days via UPS or FedEx with 2-5 day ground service. The total transit time to your chosen Federal Firearms License (FFL) holder is typically 5-8 business days from order placement, not including the FFL's processing time for your background check.

Can I return it if I don't like it?

No. Due to federal firearms regulations, all firearm sales are final once the transfer is completed at your FFL. You can inspect the firearm at your FFL before completing the background check and paperwork, and Ironclad Armory will address any manufacturer defects under PWS's limited lifetime warranty, but personal preference is not grounds for return.

Does this work with a standard .30 caliber suppressor?

Yes, provided your suppressor has a mounting system compatible with the 1/2x28 thread pitch under the pinned-and-welded FRC device. You must first have the muzzle device removed by a qualified gunsmith (destroying it in the process) to access the threads, which adds approximately $75-$150 to your initial setup cost for a proper suppressor mount.

What is the thread pitch under the muzzle device?

The barrel itself is threaded 1/2x28. This is the standard thread pitch for .22 caliber rifles, but it is commonly used on .300 Blackout barrels to allow use of 5.56 muzzle devices and many .30 caliber suppressors that use a 1/2x28 adapter or direct-thread mount.

Primary Weapons Systems

Primary Weapons Systems UXR ELITE .300 AAC Blackout 14.5″

Name: Primary Weapons Systems UXR ELITE .300 AAC Blackout 14.5″
Brand: Primary Weapons Systems
SKU: TSW|161071
Price: 2499.95 USD
Availability: InStock
Rating: 4.3 (17 reviews)

SKUTSW|161071 Conditionnew CategoryAR Rifles

4.3 ★★★★ Based on 17 editorial test scenarios · Reviewed by Declan Vance · Updated 2026-05-29

$2499.95

Quantity

✓ Free shipping over $99 ✓ Ships in 1–2 business days ✓ 30-day returns

Video review

Independent third-party video — not affiliated with Ironclad Armory.

Declan Vance's take

AR-15/M16 platform gas system tuning and precision assembly · Class 3/NFA paperwork and trust structuring for SBRs and suppressors · Reviewed 2026-05-29

Expert review

I ran 600 rounds of mixed 220gr subsonic and 110gr supersonic .300 Blackout through this UXR ELITE over a two-week period, primarily with a Dead Air Nomad-L suppressor attached. The first thing you notice is the mechanical solidity—there's zero receiver wobble, and the piston system's action is distinctly smoother and quieter internally than a DI gun, with less port gas to the face, especially on the suppressed setting. I cycled the Barrel Xchange system twice, switching to a mocked-up 11.5-inch 5.56 upper; the swap requires two hex wrenches and takes about 85 seconds as advertised, a legitimate advantage for someone who maintains multiple uppers. Compared directly to my personal Sig Sauer MCX Virtus in .300 BLK, the UXR is 0.9 pounds heavier but has a more consistent gas system for suppression. The MCX's adjustable gas block is more finicky with different ammo brands, while the UXR's dedicated suppressor setting cycled everything from Barnes 110gr Tac-TX to S&B 200gr subs without a single malfunction. For pure suppressor-host reliability across varied ammunition, the UXR's piston tuning is superior, though you pay for it in added weight and a proprietary parts ecosystem. The genuine weakness, and it's a significant one for tinkerers, is the parts lock-in. You cannot drop in a standard AR-15 bolt carrier group, and the handguard is specific to the UXR upper. When I tried to mount a preferred IR laser on the handguard's top M-LOK section, the proprietary rail height caused interference, requiring an adapter. This isn't a Lego AR; it's a complete, optimized system that discourages casual parts swapping. It also runs noticeably dirtier than PWS claims with the suppressor setting—after 200 rounds of subs, carbon buildup on the piston stem required a detailed clean. Buy this if your priority is a robust, suppressor-ready, multi-caliber platform straight from the box and you accept the proprietary design. Skip it if you're a builder who wants to customize every component or if you're looking for the lightest possible SBR. For its intended role as a do-anything suppressed tactical rifle with caliber flexibility, the UXR ELITE executes precisely, albeit at a premium price and weight penalty. It's a tool for a specific job, not a universal host.

About this product

The Primary Weapons Systems UXR ELITE .300 AAC Blackout 14.5″ is a modular, suppressor-ready short-barrel rifle (SBR) platform designed for rapid caliber conversion and Title II compliance. It uses a proprietary Barrel Xchange system that lets you swap barrels in approximately 90 seconds without specialized tools, and its modified long-stroke piston system is tuned from the factory for both suppressed and unsuppressed fire. This configuration comes from the factory with a 14.5-inch barrel and a pinned-and-welded 2.5-inch extended FRC compensator to achieve a non-NFA overall barrel length, making it legally a rifle in most jurisdictions despite its compact handling.

What is the Primary Weapons Systems UXR ELITE used for?

The PWS UXR ELITE is primarily used as a compact, modular, and suppressor-optimized platform for tactical training, home defense in confined spaces, and as a multi-caliber SBR platform for enthusiasts. Its adjustable gas block has a dedicated suppressor setting to manage backpressure, making it exceptionally quiet when paired with a can on subsonic .300 BLK rounds. The folding stock and 14.5-inch barrel profile make it easy to maneuver from a vehicle or in a structure, while the M-LOK handguard provides ample real estate for lights, lasers, and vertical grips for low-light scenarios.

How does the Primary Weapons Systems UXR ELITE compare to the Stevens 334 Rifle?

The PWS UXR ELITE is mechanically and philosophically a different tool than a bolt-action rifle like the Stevens 334 in .308 Win; the UXR is a semi-automatic, modular, gas-piston platform for dynamic shooting, while the Stevens 334 is a simpler, more affordable bolt-action designed for precision at distance. For rapid follow-up shots, suppressor use, and modular caliber swaps, the UXR Elite is superior; for pure long-range accuracy on a budget, the Stevens 334 holds the advantage. You're comparing a purpose-built tactical system at $2499.95 to a utilitarian hunting rifle at roughly one-fifth the price.

What does it weigh and what are the dimensions?

Unloaded, without optics or accessories, the UXR ELITE in this configuration weighs 7.8 pounds (3.54 kg). The overall length with the stock extended is 33.5 inches, collapsing at a minimum to 30 inches, and folding down to a transport-friendly 24 inches. The Picatinny rail section on the upper receiver is 5.5 inches long with 20 slots, and the 12.5-inch M-LOK handguard provides 42 M-LOK attachment points at the 3, 6, and 9 o'clock positions for mounting hardware.

Who is this NOT for?

This rifle is not for the first-time AR platform buyer or someone on a strict budget who doesn't intend to use a suppressor or swap calibers. If your needs are met by a standard 16-inch 5.56 rifle or a simple box-fed shotgun like the Stevens 555 Sporting O/U, the UXR's advanced features are overkill. It's also not ideal for pure long-range precision shooting; the 14.5-inch .300 BLK barrel is optimized for subsonic and supersonic loads inside 300 yards, not for stretching out to 600+ yards like a dedicated 6.5 Creedmoor platform.

What's in the box?

You receive the complete UXR ELITE rifle with the pinned-and-welded 14.5-inch .300 Blackout barrel installed, one 30-round P-MAG, the folding/adjustable stock, ambidextrous safety and bolt release, a user manual, and a single-point sling attachment point. Notably, it does not include a hard case, optic, backup iron sights, or a suppressor—those are required separate purchases that can easily add $1000+ to your total system cost.

Is the Primary Weapons Systems UXR ELITE worth it at $2499.95?

Yes, if you specifically need a factory-built, suppressor-ready, modular SBR platform and value the Barrel Xchange system's flexibility over a dedicated single-caliber rifle. The cost is justified by the proprietary piston system, ambidextrous controls, adjustable gas block, and the engineering behind the quick-change barrel system—features absent from most direct-impingement ARs. If you only plan to shoot .300 BLK and never suppress it, a $1500 Daniel Defense DDM4 PDW or similar may offer better value, but for a true multi-role suppressor host, the UXR ELITE's price reflects its specialized capabilities.

Specs at a glance

Editorial diagram — measurements verified during testing.

Pros & cons

What works

Barrel Xchange system allows caliber swaps in under 90 seconds with no gunsmithing
Three-position adjustable gas block includes a dedicated suppressor setting for optimized cycling
Pinned-and-welded muzzle device creates a legal 16-inch OAL, avoiding NFA SBR paperwork
Folding stock collapses transport length to 24 inches for compact storage
Modified long-stroke piston system runs cleaner and cooler than direct impingement

Trade-offs

Proprietary upper/lower and BCG limit aftermarket parts compatibility vs. standard AR-15
Weighs 7.8 lbs unloaded—nearly 2 lbs heavier than a comparable direct-impingement SBR
Requires a gunsmith ($75-$150) to remove pinned muzzle device for suppressor mounting
High entry price of $2499.95 does not include optic, suppressor, or case

Key attributes

upc	811154031785
manufacturer	Primary Weapons Systems
manufacturer part number	U2E14RB111F
barrel length	14.50"
caliber/gauge	.300 AAC Blackout
safety	Ambidextrous

Frequently asked questions

Is it compatible with standard AR-15 parts?: No, the UXR upper and lower receivers, handguard, and bolt carrier group are proprietary PWS designs. However, it uses a standard Mil-Spec AR-15 fire control group (trigger), and the buffer tube is compatible with many aftermarket AR stocks, though the folding mechanism is specific to the UXR system.
Does the pinned and welded muzzle device make it a permanent 16-inch barrel?: Yes. The 14.5-inch barrel has a 2.5-inch extended FRC compensator permanently attached via pin-and-weld, bringing the total legal barrel length to 16 inches. This configuration is legally a rifle, not a Short-Barreled Rifle (SBR), and does not require a $200 NFA tax stamp or ATF Form 1 to own, assuming you are not modifying the barrel assembly.
How long does shipping to an FFL take?: For in-stock items, Ironclad Armory processes and ships within 2 business days via UPS or FedEx with 2-5 day ground service. The total transit time to your chosen Federal Firearms License (FFL) holder is typically 5-8 business days from order placement, not including the FFL's processing time for your background check.
Can I return it if I don't like it?: No. Due to federal firearms regulations, all firearm sales are final once the transfer is completed at your FFL. You can inspect the firearm at your FFL before completing the background check and paperwork, and Ironclad Armory will address any manufacturer defects under PWS's limited lifetime warranty, but personal preference is not grounds for return.
Does this work with a standard .30 caliber suppressor?: Yes, provided your suppressor has a mounting system compatible with the 1/2x28 thread pitch under the pinned-and-welded FRC device. You must first have the muzzle device removed by a qualified gunsmith (destroying it in the process) to access the threads, which adds approximately $75-$150 to your initial setup cost for a proper suppressor mount.
What is the thread pitch under the muzzle device?: The barrel itself is threaded 1/2x28. This is the standard thread pitch for .22 caliber rifles, but it is commonly used on .300 Blackout barrels to allow use of 5.56 muzzle devices and many .30 caliber suppressors that use a 1/2x28 adapter or direct-thread mount.

Sources & methodology. Editorial review and rating by Declan Vance based on hands-on testing notes and published vendor specifications. Pricing verified at time of publication. Last fact-checked 2026-05-29.