AT3™ FF-ML 16 Inch Complete AR 15 PCC Upper – 9mm 16 Inch Faxon Firearms Barrel – 15 Inch M-LOK Free Float Handguard

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AT3 Tactical 9mm Bolt Carrier Group - Black Nitride


AT3 Tactical Standard GI Charging Handle - Black


AT3 16″ 9mm Complete Upper with M-LOK Handguard – Made to Order and Ships in 7 Days

AT3 Complete Upper assemblies are Built for Accuracy and Reliability – Guaranteed.

  • Quality Where it Counts – premium components like Ballistic Advantage barrels, and AT3 Tactical’s handguards and uppers. Don’t settle for “bargain uppers” with unknown components.
  • Guaranteed Reliability– Carefully assembled before shipment, and backed by the AT3 Lifetime Warranty
  • Unbeatable Value – Unbeatable quality in the price range. Save by bundling quality parts – already assembled vs. purchasing the components separately.

This fully assembled AR-15 complete upper includes:

Faxon Firearms 16″ Light Tapered 9mm Barrel

Faxon Firearms 16 Inch 9mm Light Taper Barrel

With no need for the traditional AR15 gas system, and far less heat and stress, 9mm blowback uppers like these don’t need a heavy barrel to perform great.  Faxon’s 10.5″ Light Tapered Barrel  ensures that your pistol caliber AR is easy to manipulate, and will hold up under heavy use.


AT3 SPEAR 15″ Free Float M-LOK handguard

Unique slim and lightweight design with M-LOK attachment points. Rock-solid 6061 aircraft aluminum handguard that withstands the harshest treatment. 5-slot M-LOK-to-Picatinny rail section included

AT3 Tactical Billet Upper Receiver

AT3 Tactical Billet Upper for AR15

Precision machined from 6061-T6 aluminum, this assembled upper is sleek, with extra material around the barrel extension for superior accuracy. It mates perfectly with our SPEAR handguard and feature M4 feedramps for reliable feeding of ammunition.

KAK Industry Micro Flash Can

Learn more about the KAK Flash Can

Top Add-Ons

AT3 Tactical 9mm Bolt Carrier Group with Black Nitride Finish and Removable Rear Weight

AT3’s 9mm Bolt Carrier Group is the go-to solution for a variety of builds.  Whether you’re going on a converted lower for Colt or Glock style 9mm mags, this bolt carrier will work with your magazines, and features a removable rear weight for use with Armaspec or JP recoil systems.

Your choice of Standard GI or Extended-Latch Charging Handles from AT3


These 7075-T6 charging handles slide right into our uppers for a complete top end. Choose between a standard latch and extended latch designs to fit your needs and budget.

More info:

This product is built-to-order in our Minnesota facility. Quality takes time – please allow up to 7 days for your order to ship.

All AT3 upper assemblies come with a Lifetime Warranty – if you ever have an issue, let us know, and we’ll make it right. It’s that simple.

Don’t see the options you’re looking for? Let us quote you a custom upper – contact us now.


  • Barrel Length: 16″
  • Total Assembly Length: 26″
  • Gas System: Blowback
  • Barrel Profile: Slim Taper
  • Twist Rate: 1:10
  • Barrel Steel: 4150 Chrome Moly Vanadium
  • Barrel Finish: QPQ Corrosion Resistant (Black Nitride)
  • Chamber: 9mm Luger
  • Muzzle Thread: 1/2-28
  • Barrel Extension: Blowback/Integrated
  • Gas Block Type: Low-profile
  • Receiver Material: Billet 6061-T6 Aluminum
  • Finish
    • Black: Hardcoat Anodized
    • Flat Dark Earth: H-267 Magpul® Flat Dark Earth
    • OD Green: H-232 Magpul® OD Green
    • Gray: H-188 Magpul® Stealth Grey
    • Pink: H-224 SIG™ Pink
    • Red: H-167 USMC Red
    • Burnt Bronze: H-148 Burnt Bronze
    • Tungsten: H-237 Tungsten
    • Titanium: H-170 Titanium

3 reasons why AT3 Complete Uppers are better than the rest.

1 – Quality Where it Counts

The single most important component of an accurate AR-15 is the barrel. AT3 uppers are built using barrels from top brands like Ballistic Advantage and Faxon Firearms, for excellent performance and accuracy.

But the quality doesn’t stop at the barrel. Our AT3 handguard and upper work together to provide superior accuracy, meaning this upper assembly offers quality without compromises.

Many of the “bargain” complete uppers on the market source their parts from the lowest bidder – at the expense of accuracy and reliable function. AT3 is committed to using only top-quality components in our upper assemblies.

2 – Guaranteed Reliability

AT3 complete uppers are assembled with strict quality controls and carefully packaged for delivery to the customer. All AT3 complete uppers offer a Lifetime Warranty – if you ever have an issue, let us know, and we’ll make it right. It’s that simple.

3 – Unbeatable Value

When you buy a complete upper, you’ll save money and parts and assembly vs purchasing the components separately. Our complete uppers are not the cheapest on the market, but they deliver unbeatable quality in the price range. We sell direct to the customer, and cut out the middle-men, to deliver the best value in AR-15 upper assemblies.

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Have Questions About this Product?

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

AT3 Lifetime Warranty Logo

All AT3 Tactical Brand Products carry a lifetime warranty against manufacturer’s defects.

This includes AT3 Red Dot SightsHandguardsIron Sights, and any other product that carries the “AT3 Tactical” or “AT3™” name. For other brands (ex. Magpul or Troy), please refer to the manufacturer’s warranty policy.

In the event that your AT3™ product becomes unusable, we will repair or replace the product at no charge to you.

If we cannot repair your product, we will replace it with a product in perfect working order of equal or better physical condition. The warranty is fully transferable, but we may require information about the original purchase to validate the authenticity of the product.

If your product is in need of warranty service, please contact AT3 Tactical to start the process

Our contact info is available here. To expedite processing, please provide your order information and description of the defect.

Please note: The AT3 Lifetime Warranty does not cover loss, theft, intentional damage or cosmetic damage that doesn’t affect the performance of the product.

Customer Reviews

Based on 3 reviews
Robert Kinnaird

AT3™ FF-ML 16 Inch Complete AR 15 PCC Upper – 9mm 16 Inch Faxon Firearms Barrel – 15 Inch M-LOK Free Float Handguard

Very nice product

I like the product and the way it performs!

Thanks for sharing your feedback! We're glad you're satisfied with your purchase. Cheers!

Joseph Tichenor
PCC builds

If your planning a PCC build look no further. Great price great product couldn't be happier with the service. Got my order in days, finished build, RANGE TIME!

Thanks for sharing your feedback, Joseph. We're glad you're satisfied with your purchase. Cheers!