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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- Lower Receiver Parts - AT3 Tactical (49)
- Red Dot Sights - AT3 Tactical (30)
- Uppers & Parts - AT3 Tactical (23)
- Barrels - AT3 Tactical (21)
- AR-15 Build Kits and Assemblies - AT3 Tactical (17)
- Bolt Carrier Groups - AT3 Tactical (12)
- Complete Uppers - AT3 Tactical (11)
- Buffer Tube Parts - AT3 Tactical (10)
- Muzzle Devices - AT3 Tactical (9)
- Gas Blocks & Tubes - AT3 Tactical (8)
- Handguard Accessories - AT3 Tactical (8)
- Charging Handles - AT3 Tactical (6)
- Handguards & Rails - AT3 Tactical (6)
- Tools & Cleaning - AT3 Tactical (5)
- Optic Mounts - AT3 Tactical (4)
- Backup Iron Sights - AT3 Tactical (3)
- Buttstocks - AT3 Tactical (2)
- Scopes - AT3 Tactical (2)
- Slings & Mounts - AT3 Tactical (2)
- Front Grips - AT3 Tactical (2)
- AR Furniture Kits - AT3 Tactical (1)
- Pistol Grips - AT3 Tactical (1)
- AT3 Swag - AT3 Tactical (0)
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- AT3 Tactical - Black (92)
- AT3 Tactical - Flat Dark Earth (54)
- AT3 Tactical - OD Green (50)
- AT3 Tactical - Pink (47)
- AT3 Tactical - Burnt Bronze (45)
- AT3 Tactical - Titanium (45)
- AT3 Tactical -Tungsten (45)
- AT3 Tactical - Gray (43)
- AT3 Tactical - Blue (25)
- AT3 Tactical - Red (25)
- AT3 Tactical - Stainless (9)
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AT3™Sale!
AT3™ 5.56 NATO Government Profile 11.5 Inch AR-15 Barrel
11.5 Inch Government 5.56 NATO Barrel by AT3 Tactical With a sturdy profile and proven construction, this 11.5-inch 5.56 NATO barrel features a carbine-length gas system for smoother recoil. This...$112.50Only$95.63 -
AT3™Sale!
AT3™ AR-15 3-Port Muzzle Brake with Crush Washer – 5/8×24 Thread for .300 BLK/.308...
.30 Cal AR15? Not a problem with this aggressive Muzzle Brake/Compensator With greater caliber comes greater recoil - whether you're shooting a .300 BLK AR15 or a .308 WIN AR10,... -
AT3™Sale!
AT3™ 5.56 NATO Medium Profile 7.5 Inch AR-15 Barrel
7.5 Inch Medium 5.56 NATO Barrel by AT3 Tactical With a sturdy profile and proven construction, this 7.5-inch 5.56 NATO barrel features a pistol-length gas system for smoother recoil. This...$105.00Only$89.25 -
AT3™Sale!
AT3™ 9mm Straight Profile 16 Inch AR-15 Barrel
Powerful Pistol Caliber Performance in a Carbine Package Bring the versatility of 9mm to your AR build with this straight profile 16" barrel from AT3™. Crafted from premium 4150 CrMoV...$105.00Only$89.25 -
AT3™Sale!
AT3™ Mil-Spec AR-15 Firing Pin
AT3 Hard Chrome Firing Pin The AT3™ Mil-Spec AR-15 Firing Pin is a premium replacement component for your AR-15. This component is guaranteed to fit and function in your AR... -
AT3™Sale!
AT3™ .22LR Pencil Profile 16 Inch AR-15 Barrel
Precision Rimfire Performance in a Carbine Package Bring the versatility of .22LR to your AR build with this Pencil Profile 16" barrel from AT3™. Crafted from premium 4150 CrMoV steel...$150.00Only$127.50 -
AT3™Sale!
AT3™ .22LR Dedicated Stainless Steel AR-15 Bolt Carrier Group
Build The Perfect Plinker - AT3 .22LR Dedicated Stainless Steel AR-15 BCG For dedicated .22LR AR-15 builds, this stainless steel bolt carrier group from AT3 delivers outstanding performance. Machined to...$164.99Only$140.24 -
AT3™Sale!
AT3™ 300 Blackout Medium Profile 14.5 Inch AR-15 Barrel
14.5 Inch .300 Blackout Barrel by AT3 Tactical This 14.5-inch .300 Blackout Barrel makes a great choice for your short, heavy-hitting pistol or SBR AR-15 builds. Made from 4150 CMV...$130.00Only$110.50 -
AT3™Sale!
AT3™ 300 Blackout Medium Profile 6 Inch AR-15 Barrel
6 Inch .300 Blackout Barrel by AT3 Tactical This 6-inch .300 Blackout Barrel makes a great choice for your short, heavy-hitting pistol or SBR AR-15 builds. Made from 4150 CMV...$100.00Only$85.00 -
AT3™Sale!
AT3™ 5.56 NATO Government Profile 14.5 Inch AR-15 Barrel
14.5 Inch Government 5.56 NATO Barrel by AT3 Tactical With a sturdy profile and proven construction, this 14.5 inch 5.56 NATO barrel features a midlength gas system for smoother recoil....$125.00Only$106.25 -
AT3™Sale!
AT3™ 9mm Straight Profile 4.5 Inch AR-15 Barrel
Precision Pistol Caliber Performance in a Compact Package Bring the versatility of 9mm to your AR build with this straight profile 4.5" barrel from AT3™. Crafted from premium 4150 CrMoV...$72.50Only$61.63 -
AT3™Sale!
AT3™ 5.56 NATO Pencil Profile 14.5 Inch AR-15 Barrel
14.5 Inch Pencil 5.56 NATO Barrel by AT3 Tactical With a sturdy profile and proven construction, this 14.5 inch 5.56 NATO barrel features a midlength gas system for smoother recoil....$125.00Only$106.25 -
AT3™Sale!
AT3™ 5.56 NATO Pencil Profile 13.9 Inch AR-15 Barrel
13.9 Inch Pencil 5.56 NATO Barrel by AT3 Tactical With a sturdy profile and proven construction, this 13.9-inch 5.56 NATO barrel features a midlength gas system for smoother recoil. This...$125.00Only$106.25 -
AT3™Sale!
AT3™ .22LR Tapered Profile 9 Inch AR-15 Barrel
Precision Rimfire Performance in a Compact Package Bring the versatility of .22LR to your AR build with this tapered 9" barrel from AT3™. Crafted from premium 4150 CrMoV steel per...$112.50Only$95.63 -
AT3™Sale!
AT3™ .22LR Tapered Profile 4.5 Inch AR-15 Barrel
Precision Rimfire Performance in a Compact Package Bring the versatility of .22LR to your AR build with this tapered 4.5" barrel from AT3™. Crafted from premium 4150 CrMoV steel...$87.50Only$74.38 -
AT3™Sale!
AT3™ 7.62×39 Medium Profile 16 Inch AR-15 Barrel
16 Inch 7.62x39 Barrel by AT3 Tactical This 16-inch 7.62x39 Barrel makes a great choice for your hybrid AR-15 builds. Made from 4150 CMV steel per Mil-B-11595E, and finished with...$130.00Only$110.50 -
AT3™Sale!
AT3™ 9mm Straight Profile 11 Inch AR-15 Barrel
Powerful Pistol Caliber Performance in a Compact Package Bring the versatility of 9mm to your AR build with this straight profile 11" barrel from AT3™. Crafted from premium 4150 CrMoV...$90.00Only$76.50 -
AT3™Sale!
AT3 Tactical Delta Ring Tool – For AR15 Handguard Removal
Remove Stock AR15 Handguards with Ease If you've ever tried to remove a handguard and got fed up with how awkward it was just to pry back the Delta Ring,... -
AT3™Sale!
AT3™ AR15 Forward Assist
AT3 AR-15 Forward Assist Assembly Mil-Spec forward assist assembly. Made for AR-15/M16 and in the USA. ?Backed by the AT3 Lifetime Warranty Includes: Forward Assist Assembly Forward Assist Spring Forward... -
AT3™Sale!
AT3 RD-ARMOR Protective Cover with Lens Caps for RD-50 Red Dot Sight
Protect your RD-50 with this easy-to-install cover, with captive lens caps for quick, easy deployment! The RD-ARMOR is a cover for the AT3 RD-50 that protects your optic from dust,... -
AT3™Sale!
AT3™ Handguard End Cap – Round
AT3™ Handguard End Cap - Round The Mil-Spec AR-15 Handguard End Cap is a high-quality part for your AR-15. The end cap features a .750" diameter barrel opening, making it... -
AT3™Sale!
AT3 Tactical Gas Rings for AR15 Bolts – Set of 3
Set of 3 Gas Rings for Repairing an AR15 Bolt If your AR15 isn't cycling reliably, it may be due to the gas rings on your bolt wearing out. The... -
AT3™Sale!
AT3 Tactical Extractor Retainer Pin for AR 15
Replacement Extractor Retainer Pin for AR-15 The extractor pin is a simple part that your AR-15 needs for reliable function. Or rather, basic function. Without this pin to hold the... -
AT3™Sale!
AT3™ AR15 Ejection Port / Dust Cover Assembly
AT3 AR-15 Ejection Port Assembly Often called the "dust cover" on an AR-15, the ejection port cover helps seal your AR-15's bolt carrier against the elements while not in use. ...
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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