Introducing AT3 ARO-MINI Red Dot Sight – Now Available!

AT3™ Complete Rifle Kit – Magpul Lower Build Kit – .223/5.56 16 Inch Ballistic Advantage Barrel – M-LOK Free Float Handguard

Out of Stock
Orders will Ship within 1 Business Day
Backed by the AT3 Lifetime Warranty!
TOP ADD-ON'S

AT3™ Red Tail™ Rifle Scope with Mount - 1-6x Magnification

$299.99
AT3™ M-LOK Rail Section - 5 or 7 Slots - Made in USA - 7 Colors Available

AT3™ M-LOK Rail Section – 5 Slot - Black

$14.99
AT3™ M-LOK Rail Section - 5 or 7 Slots - Made in USA - 7 Colors Available

AT3™ M-LOK Rail Section – 5 Slot - FDE

$19.99
AT3™ M-LOK Rail Section - 5 or 7 Slots - Made in USA - 7 Colors Available

AT3™ M-LOK Rail Section – 5 Slot - OD Green

$19.99

Instant Rifle.  Just Add Lower.

Don’t settle for the budget-line rifle kits you’re used to seeing.  Get a complete assembled upper from AT3 Tactical, with a lower build kit including a Magpul CTR Stock and Pistol Grip, plus our enhanced Nickel Teflon Trigger assembly.  This is absolutely the best bang for your buck.

The AT3 Rifle Kit Includes:

  • AT3 FFML 16″ M-LOK Complete Upper

    • Lightweight Ballistic Advantage Barrel
    • AT3 SPEAR M-LOK Handguard and Billet Upper
    • AT3 Black Nitride Bolt Carrier Group
    • Your Choice of Muzzle Device and Charging Handle
  • AT3 Enhanced Nickel Teflon Trigger Group
  • Magpul CTR Stock, MOE Pistol Grip, and Trigger Guard
  • AT3 Buffer Tube Kit and Lower Parts Kit

Freedom of Choice

Your choice of standard Black, Magpul Flat Dark Earth, Magpul Stealth Grey, and Magpul OD Green to have your receiver, handguard, and all furniture matching on your new build!

 

Your choice of 3 different muzzle devices (choose type with dropdown menu)

Complete Upper Muzzle Devices - A2 Flash Hider, Combat Flash Hider

Learn more about these muzzle devices: A2 Flash HiderCombat Flash Hider

 

Your choice of Standard GI or Extended-Latch Charging Handle

Quality 7075-T6 charging handles – choose between standard latch and extended latch designs.

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 rifle kit – contact us now.

Specifications:

  • Barrel Length: 16″
  • Gas System: Midlength
  • Barrel Profile: Pencil
  • 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
  • Receiver Extension Material: 6061 T6 Aluminum

Products available on this page:

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 7 reviews
86%
(6)
0%
(0)
14%
(1)
0%
(0)
0%
(0)
M
Matt
Great build

Great beginner build kit it's complete with everything you need except the lower. I enjoyed the process start to finish, learned some things along the way. Brought it to the range Sunday. Minimal adjustments need spot on every shot

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

C
Chris
6of5

This is my first AR but I have shot a lot of them. I have seen a bunch of my friends build them and they all love this AT3. Many of them after shooting it say they wish they had found a deal like this when they were looking. The finish is awesome the lines are slick. The way the rail meets the upper is beautiful and a very nice touch. I built this upper on a spikes tactical lower and it fits phenomenally. Nice and tight. No wiggle. I chose the grey option. It's quiet enough to not say look at me but when people see it up close they love it. The grey adds a nice classy touch. Everything operates smoothly and I have not had a single operational issue with it after about 1800 rounds shooting all kinds of diffrent ammo. Price plus quality... I highly recommend anyone looking to build to check AT3 out first. Can't wait to build a 300 blackout using you product AT3. Thanks again for the quality and top notch customer service.

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

J
Jayson Powell
Excellent quality

This complete kit is excellent! The fit and finish was perfect, not a single complaint. The trigger feels great, everything assembled super smooth. Definitely will be buying from AT3 again!

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

J
Jase
Great buy

This is a great deal on a great build kit. Once you get the lower this kit is ready to rock n roll. No issues at all.

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

P
Peter Figueroa
BEST KIT EVER !!!

When I first stumbled upon AT3 I was in the market for a 223 kit that was not only affordable but a true value and I found it ! This kit is the best bang for your buck , most kits try to sell you a substandard barrel with mediocre parts BUT not AT3, the Ballistic Advantage Barrel is the heart of this kit and if you ask any AR enthusiasts they will all tell you it comes down to the quality of said barrel. The upper assembly is as tight , no gaps , this looks like a high end rifle through and through! And how many kits offer cerakote colors without an upcharge, no one but AT3 , This is my new favorite of my 223s and if your worried about no forward assist ,DONT, you'll never need it with this beauty , the action is so smooth ! My next kit will be the same but in OD Green , don't miss out you will regret not getting one especially if one of your buddies does , THANK YOU AT3 FOR EXCEPTIONAL SERVICE AND A QUALITY WEAPON , YOUR MY NEW GO TO STORE !!!

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

Customers who viewed this item also viewed these products

AT3 Complete 9mm Pistol Caliber Carbine Upper 16 Inch Faxon Barrel

AT3™ FF-ML 16 Inch Complete AR 15 PCC Upper –...

$337.99
AT3 16″ 9mm Complete Upper with M-LOK Handguard – Made to Order and Ships in
AT3™ FF-ML 11.5" Complete Pistol Upper - .223/5.56 11.5" Ballistic Advantage Barrel - 12" M-LOK Free Float Handguard

AT3™ FF-ML 11.5" Complete AR 15 Pistol Upper - .223/5.56...

$374.99
The AT3 11.5″ Pistol Upper with SPEAR M-LOK Handguard – Made to Order and
AR Pistol Upper for AR-15 from AT3™

AT3™ FF-ML 10.5″ Complete AR 15 Pistol Upper – Choose...

$340.99
The AT3 10.5″ Pistol Upper with SPEAR M-LOK Handguard – Made to Order and
VYPR M-Lok Free Float Handguard 15" - AR15/M4 (15VM) | Stngr USA

STNGR VYPR® M-LOK Free Float AR-15 Handguard

$139.99
STNGR VYPR – THE BEST MOTHER FUNCTIONING HANDGUARD ON THE PLANET. Based on 5-star

AT3 AR 15 Lower Build Kit - Magpul Stock and...

$175.99
Finish Off Your New Rifle Lower with an Enhanced Trigger and Matching Magpul Furniture
Ruger AR-556 16 inch Rifle 30 Round - M-LOK Handguard - RUG8529

Ruger AR-556 16″ AR-15 Rifle .223/5.56 NATO 30 Round –...

$749.99
Fantastic Semi-Automatic Rifle Option For Both Old & First Time AR Owners The Ruger
AT3™ FF-ML 16 Inch .300 BLK Complete Upper - .300 AAC Blackout 16 Inch Ballistic Advantage Barrel - 15" M-LOK Free Float Handguard

AT3™ FF-ML 16 Inch .300 BLK Complete AR 15 Upper...

$413.99$372.59
 The AT3 16″ .300 BLK Rifle Upper with SPEAR M-LOK Handguard – Made to
AT3™ FF-ML 11.5 Inch Complete Pistol Upper - .223/5.56 11.5 Inch Faxon Firearms Barrel - 12 Inch M-LOK Free Float Handguard

AT3™ FF-ML 11.5 Inch Complete AR 15 Pistol Upper -...

$405.99
AT3 11.5″ Pistol Upper with Faxon Firearms Midlength Barrel – Made to Order and
Aero Precision M4E1 16" Complete AR15 MLOK Mid-Length Free-Float Upper - .223/5.56

Aero Precision M4E1 16" Complete AR15 MLOK Mid-Length Free-Float Upper...

(no reviews yet)
$589.99
Aero Precision M4E1 16″ Complete AR15 MLOK Mid-Length Free-Float Upper – .223/5.56 The Aero
RPTR M-Lok Free Float Handguard 15" - AR15/M4 (15RM) | Stngr USA

STNGR RPTR® M-LOK Free Float AR-15 Handguard

(no reviews yet)
$149.99
STNGR RPTR – THE BEST MOTHER FUNCTIONING HANDGUARD ON THE PLANET. Based on 5-star
AT3™ FF-ML Complete Rifle Upper - .223/5.56 16" Ballistic Advantage Barrel - M-LOK Free Float Handguard

AT3™ FF-ML Complete Rifle AR 15 Upper - .223/5.56 16"...

$391.99
16 Inch Lightweight AT3 Upper with 15 Inch Handguard – Made to Order and
AT3 Complete 9mm Pistol Caliber Carbine Upper 10.5 Inch Faxon Barrel

AT3™ FF-ML 10.5 Inch Complete PCC AR 15 Upper –...

$315.99
AT3 10.5″ 9mm Complete Upper – Made to Order and Ships in 7 Days

Frequently purchased together

Breek Arms 2BO Outside Threaded 2-Port Muzzle Brake for AR-15...

$29.99
Breek 2BO Muzzle Brake – AR-15 and AR-10 The Breek Arms 2BO Muzzle Brake
AT3 Red Dot Magnifier w/ 3x Flip to Side Mount

AT3™ RRDM™ 3x Red Dot Magnifier w/ Flip to Side...

$109.99
Extend the range of your Red Dot Sight with the AT3 3X RRDM (Ruggedized
Faxon Firearms Full Mass 9mm Bolt Carrier Group with Removable Weight

Faxon Firearms 9mm Nitride Bolt Carrier Group - Glock &...

$151.80
Proven, Reliable, and Compatible with Glock and Colt Lowers Faxon’s 2nd Generation 9mm Bolt
AT3™ Charging Handle with Extended Latch - CH-05

AT3™ AR 15 Charging Handle with Extended Latch - CH-05

$24.99
Quality Charging Handle with Upgraded Latch for Easy Operation The AT3 Tactical Extended Latch
Glock OEM 33 Round Magazine - 9mm - AT3 Tactical

Glock OEM 33 Round Magazine - 9mm

(no reviews yet)
$40.00
Make Range Day Better with the 9mm Fun Stick! Each GLOCK magazine is constructed

Sylvan Arms AR-15 to 9mm Conversion Block for Glock Pattern...

$94.99
Easily Convert Your AR-15 Lower to Accept Glock Magazines The Sylvan Arms AR-15 to

Luth-AR Mil-Spec AR-15 Charging Handle

(no reviews yet)
$21.99
Luth-AR Milspec Charging Handle Luth-AR makes a variety of high-quality AR-15 parts that won’t
Breek Arms 2BO-S Outside Threaded Single Port Muzzle Brake for AR15

Breek Arms 2BO-S Outside Threaded Single Port Muzzle Brake for...

Breek Arms 2BO-S Single Port Muzzle Brake – Recoil Reduction for Precision Shooting The

AT3 Tactical Standard GI AR 15 Charging Handle - 10...

$18.99
Classic Mil-Spec Charging Handle – Light and Strong – A Great Value Easily chamber
Breek Arms Blast Shield

Breek Arms Castle Blast Shield for Outside Threaded Muzzle Devices

$29.99
Thread-On Blast Shield for Breek Arms Muzzle Devices This is the perfect add-on for

Strike Industries Angled M-LOK Vertical Grip with Cable Management

$17.95
Angled Vertical Grip with Cable Management: Enhance Control and Organization Elevate your rifle’s performance
Aero Precision EPC Lower Receiver - Accepts 9mm and .40 S&W Glock Magazines

Aero Precision EPC-9 AR 15 Lower Receiver - Glock Magazine...

$169.99
Enhanced 9mm AR Lower Receiver for Pistol Caliber Carbines Before you ask – yes,