AT3™ Assembled AR-15 Upper – .223/5.56 16″ Ballistic Advantage Barrel – No BCG/CH

16 Inch Lightweight AT3 Upper with 15 Inch Handguard

Built to Order – Ships Within 3 Business Days

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

• Quality Where it Counts – premium components like Faxon Firearms 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 money by bundling, and save time by letting us do the assembly!

This fully assembled AR-15 complete upper includes:

16″ Ballistic Advantage Pencil Profile 5.56 NATO Barrel (with AT3 low profile gas block & midlength gas tube)

AT3 SPEAR Free Float M-LOK handguard

Lightweight and tough, this unique M-LOK handguard is the best rail we offer. This rock-solid 6061 aircraft aluminum handguard that withstands the harshest treatment. 5-slot M-LOK-to-Picatinny rail section included

AT3 Tactical Slick Side 6061 T-6 Upper Receiver

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.

Your choice of muzzle device(choose type with dropdown menu)

Learn more about these muzzle devices: A2 Flash Hider, Combat Flash Hider

Top Add-Ons

AT3 Black Nitride Bolt Carrier Group

Finish your complete upper with a reliable, easy to clean Black Nitride Bolt carrier group from AT3. They feature M16 carriers, and MPI inspected bolts made from 9310 steel and properly staked grade 8 gas key screws.

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.

Specifications:

• Barrel Length: 16″
• Total Assembly Length: 24.5″
• Gas System: Midlength
• Barrel Profile: Pencil profile
• Twist Rate: 1:7
• Barrel Steel: 4150 Chrome Moly Vanadium
• Barrel Finish: QPQ Corrosion Resistant (Nitride)
• Chamber: 5.56 NATO
• Muzzle Thread: 1/2-28
• Barrel Extension: M4
• Diameter at Gas Block: .625″
• 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
  • 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. This upper is assembled with a lightweight Ballistic Advantage barrel for excellent performance and handling.

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.

Products available on this page:

• AT3™ Assembled AR-15 Upper - .223/5.56 16" Ballistic Advantage Barrel - No BCG/CH - Color: Burnt Bronze, Muzzle Device: A2 Flash Hider  |  SKU: FFML-SPEAR-15-0-BB
• AT3™ Assembled AR-15 Upper - .223/5.56 16" Ballistic Advantage Barrel - No BCG/CH - Color: OD Green, Muzzle Device: A2 Flash Hider  |  SKU: FFML-SPEAR-15-0-ODG
• AT3™ Assembled AR-15 Upper - .223/5.56 16" Ballistic Advantage Barrel - No BCG/CH - Color: Flat Dark Earth, Muzzle Device: A2 Flash Hider  |  SKU: FFML-SPEAR-15-0-FDE
• AT3™ Assembled AR-15 Upper - .223/5.56 16" Ballistic Advantage Barrel - No BCG/CH - Color: Red, Muzzle Device: A2 Flash Hider  |  SKU: FFML-SPEAR-15-0-RED
• AT3™ Assembled AR-15 Upper - .223/5.56 16" Ballistic Advantage Barrel - No BCG/CH - Color: Red, Muzzle Device: Combat Flash Hider  |  SKU: FFML-SPEAR-15-3-RED
• AT3™ Assembled AR-15 Upper - .223/5.56 16" Ballistic Advantage Barrel - No BCG/CH - Color: Pink, Muzzle Device: A2 Flash Hider  |  SKU: FFML-SPEAR-15-0-PNK
• AT3™ Assembled AR-15 Upper - .223/5.56 16" Ballistic Advantage Barrel - No BCG/CH - Color: Pink, Muzzle Device: Combat Flash Hider  |  SKU: FFML-SPEAR-15-3-PNK
• AT3™ Assembled AR-15 Upper - .223/5.56 16" Ballistic Advantage Barrel - No BCG/CH - Color: Burnt Bronze, Muzzle Device: Combat Flash Hider  |  SKU: FFML-SPEAR-15-3-BB
• AT3™ Assembled AR-15 Upper - .223/5.56 16" Ballistic Advantage Barrel - No BCG/CH - Color: Tungsten, Muzzle Device: A2 Flash Hider  |  SKU: FFML-SPEAR-15-0-TG
• AT3™ Assembled AR-15 Upper - .223/5.56 16" Ballistic Advantage Barrel - No BCG/CH - Color: Tungsten, Muzzle Device: Combat Flash Hider  |  SKU: FFML-SPEAR-15-3-TG
• AT3™ Assembled AR-15 Upper - .223/5.56 16" Ballistic Advantage Barrel - No BCG/CH - Color: Titanium, Muzzle Device: A2 Flash Hider  |  SKU: FFML-SPEAR-15-0-TI
• AT3™ Assembled AR-15 Upper - .223/5.56 16" Ballistic Advantage Barrel - No BCG/CH - Color: Titanium, Muzzle Device: Combat Flash Hider  |  SKU: FFML-SPEAR-15-3-TI
• AT3™ Assembled AR-15 Upper - .223/5.56 16" Ballistic Advantage Barrel - No BCG/CH - Color: OD Green, Muzzle Device: Combat Flash Hider  |  SKU: FFML-SPEAR-15-3-ODG
• AT3™ Assembled AR-15 Upper - .223/5.56 16" Ballistic Advantage Barrel - No BCG/CH - Color: Flat Dark Earth, Muzzle Device: Combat Flash Hider  |  SKU: FFML-SPEAR-15-3-FDE
• AT3™ Assembled AR-15 Upper - .223/5.56 16" Ballistic Advantage Barrel - No BCG/CH - Color: Black, Muzzle Device: A2 Flash Hider  |  SKU: FFML-SPEAR-15-0
• AT3™ Assembled AR-15 Upper - .223/5.56 16" Ballistic Advantage Barrel - No BCG/CH - Color: Black, Muzzle Device: Combat Flash Hider  |  SKU: FFML-SPEAR-15-3