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AT3 Tactical Optics and AR-15 Parts

High-Quality AR 15 Parts & Accessories by AT3 Tactical

Our signature line of parts & accessories – we keep the prices low by selling directly to the customer and avoiding distributor markups!

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AT3 Tactical Rifles

AT3 Tactical Red Dot Sights

AT3 Tactical Complete Upper Receivers

AT3 Tactical AR-15 Build Kits & Assemblies

AT3 Tactical Lower Receivers

AT3 Tactical Lower Receiver Parts

AT3 Tactical Scopes

AT3 FLATLINE Upgrades

AT3 Tactical Buffer Tube Parts

AT3 Tactical AR-15 Furniture Kits

AT3 Tactical Backup Iron Sights

AT3 Tactical Optic Mounts

AT3 Tactical AR-15 Charging Handles

AT3 Tactical AR-15 Bolt Carrier Groups

AT3 Tactical Upper Receivers & Parts

AT3 Tactical Barrels

AT3 Tactical Muzzle Devices

AT3 Tactical Gas Blocks and Tubes

AT3 Tactical Handguards and Quad Rails

AT3 Tactical Handguard Accessories

AT3 Tactical AR-15 Sling Mounts

AT3 Tactical Front Grips

AT3 Tactical Buttstocks

AT3 Tactical Pistol Grips

AT3 Tactical AR-15 Tools

397 products

AT3 Tactical Flat Face 2 Stage Phosphate Trigger - 4.5 Pound Pull

AT3 Tactical Phosphate Flat Face 4.5lb 2-Stage AR-15 Trigger

(1)

AT3 Flatline AR-15 Rifle

AT3™ AT-15 FLATLINE Rifle 16 Inch 5.56 NATO – 15 Inch M-LOK Handguard

3 options

(1)

AT3™ RCO + RRDM Magnified Red Dot Kit - Includes Red Dot with Circle Dot Reticle & 3x Magnifier

AT3™ RCO + RRDM Magnified Red Dot Kit – Includes Red Dot with Circle Dot Reticle & 3x Magnifier

(8)

AT3™ AR-15 Bolt Carrier Group - 6.5 Grendel Type II - Black Nitride

AT3™ AR-15 Bolt Carrier Group – 6.5 Grendel/6mm ARC – Black Nitride

(4)

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

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

24 options

(8)

AT3 Tactical 16 Inch 300 BLK Complete AR-15 Upper Assembly - No BCG or Charging Handle

AT3™ 16 Inch Assembled AR-15 PCC Upper – 9mm 16 Inch Faxon Firearms Barrel – No BCG/CH

8 options

(4)

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

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

8 options

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

8 options

AT3™ .22LR Dedicated Stainless Steel AR-15 Bolt Carrier Group

(1)

AT3 Tactical AR-9 Barrel – 8.3″ – 9mm – Straight Profile

(1)

AT3 Tactical™ 30mm Cantilever Scope Mount - High

AT3 Tactical™ 30mm Cantilever Scope Mount – High

(5)

AT3™ Forged AR-15 Upper Receiver Kit - Includes Matching Forward Assist & Dust Cover Assemblies

AT3™ Forged AR-15 Upper Receiver Kit – Includes Matching Forward Assist & Dust Cover Assemblies

7 options

AT3™ Polymer M-LOK Rail Section – 5 Slots – Made in USA

(1)

AT3 Tactical AR-15 Barrel – 4.5″ – .22LR – Tapered Profile

(2)

AT3 Tactical Gas Rings for AR-15 Bolts - Set of 3

AT3 Tactical Gas Rings for AR-15 Bolts – Set of 3

(6)

AT3™ Enhanced Mil-Spec AR-15 Hammer

AT3™ Enhanced Mil-Spec AR-15 Hammer

(9)

20% off

AT3 Tactical Lower Parts Kit With 2 Stage Nickel Boron Trigger

AT3™ 2-Stage AR-15 Lower Parts Kit with 4.5lb Nickel Boron Trigger – No Grip or Trigger Guard

2 options

(25)

AT3 Tactical AR-15 Barrel – 16″ – 5.56 NATO – Pencil Profile – Mid-length

(1)

AT3™ Mil-Spec AR-15 Disconnector

AT3™ Mil-Spec AR-15 Disconnector

(7)

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

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

24 options

(4)

AT3™ ARO + DELTA Red Dot Kit – Includes Red Dot Sight & 3x Magnifier

AT3™ RD-50 + DELTA Red Dot Kit – Includes Red Dot Sight & 3x Magnifier

(1)

AT3™ Handguard End Cap - Round

AT3™ Handguard End Cap – Round

(10)