AT3 Tactical Complete Upper Receivers

Built with quality components and manufacturing processes – AT3 Complete Upper assemblies are Built for Accuracy and Reliability – Guaranteed.

For a truly awesome build, use AT3 Complete Upper Receiver Assemblies. When it comes to AR-15, don’t settle for less. You can expect quality where it counts. Shop now!

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AT3™ 16 Inch .300 BLK Complete AR-15 Upper - .300 AAC Blackout 16 Inch Ballistic Advantage Barrel - With Nickel Boron BCG and Mil-Spec CH

AT3™ .300 BLK 16″ Complete Assembled AR-15 Upper – With Nickel Boron BCG and Charging Handle

Sale!

AT3™ 10.5 Inch .300 Blackout Pistol Upper for AR-15 - With Nickel Boron BCG and Mil-Spec CH

AT3™ 10.5 Inch .300 Blackout Complete Assembled Pistol Upper for AR-15 – With Nickel Boron BCG and Mil-Spec CH

DAILY DEAL

AT3™ 22LR 16″ Assembled Upper – 2A Basics ASAL 15" Handguard – with BCG/Charging Handle

AT3™ 22LR 16″ Assembled Upper – 2A Basics ASAL 15″ Handguard – with BCG/Charging Handle

Save 15%

DAILY DEAL

AT3™ 22LR 16″ Assembled Upper – 2A Basics ASAL 15" Handguard – with BCG/Charging Handle/Magazine

AT3™ 22LR 16″ Assembled Upper – 2A Basics ASAL 15″ Handguard – with BCG/Charging Handle/Magazine

Save 15%

Sale!

AT3™ 10.5 Inch Complete AR-15 Pistol Upper - 10.5 Inch Faxon .223/5.56 SOCOM Barrel - With Nickel Boron BCG and Mil-Spec CH

AT3™ .223/5.56 10.5″ Complete Assembled AR-15 Upper – With Nickel Boron BCG and Charging Handle

Sale!

AT3 Tactical 10.5 Inch 300 BLK Complete AR-15 Upper Assembly - No BCG or Charging Handle

(13)

AT3™ 10.5 Inch .300 Blackout Assembled Pistol Upper for AR-15 – No BCG/CH

Sale!

AT3 Tactical Rifle Kit with Lightweight Barrel FDE

(7)

AT3™ Complete M-LOK AR-15 Rifle Kit with 16 Inch Pencil Barrel

Sale!

AT3 Tactical 10.5 Inch 9mm Complete AR-15 Upper Assembly - No BCG or Charging Handle copy

(3)

AT3™ 10.5 Inch Assembled PCC AR-15 Upper – 9mm 10.5 Inch Faxon Firearms Barrel – No BCG/CH

Sale!

AT3™ 16″ .22LR Complete Assembled Upper with BCG and Charging Handle

Sale!

AT3 Tactical Complete .350 Legend AR-15 Upper Receiver - No BCG or CH - Black

AT3™ Assembled AR-15 Upper – .350 Legend Faxon Barrel – No BCG or CH

Sale!

AT3™ FF-ML 16 Inch .300 BLK Complete Upper - .300 AAC Blackout 16 Inch Ballistic Advantage Barrel - 15" M-LOK Free Float Handguard

(7)

AT3™ 16 Inch .300 BLK Assembled AR-15 Upper – 16 Inch Ballistic Advantage Barrel – No BCG/CH

Sale!

AT3™ FF-ML 10.5 Inch Complete Pistol Upper - Faxon Firearms 10.5 Inch .223/5.56 Barrel - 9" M-LOK Free Float Handguard

(8)

AT3™ 10.5 Inch Assembled AR-15 Pistol Upper – 10.5 Inch Faxon .223/5.56 SOCOM Barrel – No BCG/CH

Sale!

AT3 Complete .223 Wylde Match Grade Upper Faxon Heavy Fluted Barrel

(3)

AT3™ Assembled Match Grade AR-15 Upper – .223 Wylde 16 Inch Faxon Firearms Barrel – No BCG/CH

Sale!

AT3™ Assembled Forged Upper for AR-15 - 5.56 NATO - 16" Barrel - 15" Free Float Quadrail - No BCG/CH

AT3™ Assembled Forged Upper for AR-15 – 5.56 NATO – 16″ Barrel – 15″ Free Float Quadrail – No BCG/CH – 3 Colors

Sale!

AT3™ Assembled Forged Upper for AR-15 - 5.56 NATO - 16" Barrel - 12.5" Free Float Quadrail - No BCG/CH

AT3™ Assembled Forged Upper for AR-15 – 5.56 NATO – 16″ Barrel – 12.5″ Free Float Quadrail – No BCG/CH – 3 Colors

Sale!

AT3™ 16″ .22LR Complete Assembled Forged Upper with BCG, Charging Handle, & Magazine - 8 Colors

(1)

AT3™ 16″ .22LR Complete Assembled Forged Upper with BCG, Charging Handle, & Magazine – 8 Colors

Sale!

AT3™ Assembled Upper for AR-15 - 5.56 NATO - 16" Barrel - 15" Free Float Quadrail - No BCG/CH - 3 Colors

(2)

AT3™ Assembled Upper for AR-15 – 5.56 NATO – 16″ Barrel – 15″ Free Float Quadrail – No BCG/CH – 3 Colors

Sale!

AT3™ Assembled Upper for AR-15 - 5.56 NATO - 16" Barrel - 9" Free Float Quadrail - No BCG/CH. - 3 Colors

AT3™ Assembled Upper for AR-15 – 5.56 NATO – 16″ Barrel – 9″ Free Float Quadrail – No BCG/CH. – 3 Colors

Sale!

AT3™ 16″ .22LR Complete Assembled Upper with BCG, Charging Handle, & Magazine - Black

AT3™ 16″ .22LR Complete Assembled Upper with BCG, Charging Handle, & Magazine – 8 Colors

Sale!

AT3™ 16″ .22LR Complete Assembled Forged Upper with BCG and Charging Handle - 8 Colors

AT3™ 16″ .22LR Complete Assembled Forged Upper with BCG and Charging Handle – 8 Colors

Sale!

AT3™ Assembled Forged Upper for AR-15 - 5.56 NATO - 16" Barrel - 9" Free Float Quadrail - No BCG/CH - 3 Colors

AT3™ Assembled Forged Upper for AR-15 – 5.56 NATO – 16″ Barrel – 9″ Free Float Quadrail – No BCG/CH – 3 Colors

Sale!

AT3™ Assembled Upper for AR-15 - 5.56 NATO - 16" Barrel - 12.5" Free Float Quadrail - No BCG/CH - 3 Colors

AT3™ Assembled Upper for AR-15 – 5.56 NATO – 16″ Barrel – 12.5″ Free Float Quadrail – No BCG/CH – 3 Colors

Sale!

2A Basics 5.56 NATO .223 Rem 16 Inch Complete AR-15 Upper Receiver - No BCG or Charging Handle

(1)

AT3™ 5.56 16″ Assembled Upper – 2A Basics ASAL Handguard – No BCG/Charging Handle

Sale!

2A Basics 9mm 16 Inch Complete AR-9 Upper Receiver - No BCG or Charging Handle

AT3™ 9MM 16″ Assembled Upper – 2A Basics ASAL Handguard – No BCG/Charging Handle