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!
Sort
Filter
Show In-Stock Only?
Price
Product Type
- 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)
Caliber
Color
- 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)
List
Grid
-
AT3™Sale!
AT3™ AR-15 Bolt Carrier Group – 6.5 Grendel Type II – Nickel Boron
Run Your 6.5 Grendel or 6mm ARC Upper Right with a NiB BCG It's important to have a bolt carrier group that has everything you need. MPI inspected bolt, properly... -
AT3™Sale!
AT3™ .750″ (3/4″) Low Profile Long AR 15 Gas Block – Steel
The AT3 Long Low Profile Gas Block is designed to cover up barrel scars that are left after removing an AR-15 front sight base FEATURES 3/4" (.750") size – works... -
AT3™Sale!
AT3™ ARO + 4xRDM Magnified Red Dot Kit – Includes Red Dot, Riser, &...
Combine our Latest Red Dot Sight and Magnifier for a Crisp, Open Sight Picture from 1x to 4x Magnification Save on these two optics by bundling them together! More information... -
AT3™Sale!
AT3™ Barrel Nut Wrench for SPEAR M-LOK Handguards and Pro Quad Rails
Spare Barrel Nut Wrench for AT3's Handguards If you lost the barrel nut wrench for your SPEAR M-LOK handguard or your Pro Quad Rail, or just need a spare, we... -
AT3™Sale!
AT3™ Mil-Spec AR-15 Trigger Spring
Mil-Spec AR-15 Trigger Spring All AT3 Tactical lower receiver parts meet or exceed Mil Spec. These parts are guaranteed to fit and function in your AR trigger group and are... -
AT3™Sale!
AT3™ GI Trigger Assembly – Mil-Spec AR-15 Fire Control Group
A Reliable GI Trigger with Ground Engagement Surfaces for a Smoother Pull When it comes to the classic AR-15 trigger you typically see in off-the-shelf rifles, they can leave a...$24.99Only$21.24 -
AT3™Sale!
AT3 Tactical Logo Magnet
Stick it somewhere! Gun Safe, Ammo Box, or on the Fridge! This AT3 logo magnet is great to just slap onto any surface that can support it. It's 20 mil...$2.99Only$2.54 -
AT3™Sale!
AT3™ 5.56 NATO Government Profile 16 Inch AR-15 Barrel
16 Inch Government 5.56 NATO Barrel by AT3 Tactical With a sturdy profile and proven construction, this 16 inch 5.56 NATO barrel features a midlength gas system for smoother recoil....$125.00Only$106.25 -
AT3™Sale!
AT3™ RCO + DELTA Red Dot Kit – Includes Red Dot Sight & 3x...
This kit combines the AT3 RCO Red Dot Sight with Circle Dot Reticle, and the DELTA 3x Magnifier with Flip-To-Side QD Mount for a versatile, accurate, and durable optic setup.... -
AT3™Sale!
AT3™ 3XP + ARO Combo – Includes 3x Prism Scope & Micro Red Dot...
This kit combines the AT3 ARO with Low Mount, and the AT3 3xP 3x Prism Scope for a versatile, accurate, and durable optic setup. This kit saves you $25 vs... -
AT3™Sale!
AT3 Tactical Can Koozie
Keep Your Drinks Cold on a Hot Range! This AT3 can koozie does exactly what you can expect: it keeps your drinks cold on a warm day. Some might attribute...$4.99Only$4.24 -
AT3™Sale!
AT3™ Enhanced Mil-Spec AR-15 Trigger
Nickel Teflon Coated for a Smoother Trigger Pull All AT3 Tactical lower receiver parts meet or exceed Mil Spec. These parts are guaranteed to fit and function in your AR15... -
AT3™Sale!
AT3 Tactical Hat – Mesh Trucker Cap – Black
Sunshade, brass deflector, handsomeness enhancer. What more do you want from a hat? Pretty self-explanatory. We went for a good-quality hat that's comfortable to wear on the range while repping... -
AT3™Sale!
AT3 Tactical Cam Pin for AR15 BCG
Replacement Cam Pin for AR-15 The cam pin is a crucial component in your AR-15's bolt carrier group. It rotates inside the bolt carrier as the bolt locks and unlocks...$4.99Only$4.24 -
AT3™Sale!
AT3™ .300 Blackout Medium Profile 10.5 Inch AR-15 Barrel
10.5 Inch .300 Blackout Barrel by AT3 Tactical This 10.5 Inch .300 Blackout Barrel makes a great choice for your short, heavy-hitting pistol or SBR AR-15 builds. Made from 4150...$112.50Only$95.63 -
AT3™Sale!
AT3™ M-LOK Polymer Rail Section with Aluminum QD Sling Mount
Low Cost Polymer M-LOK Rail Section with QD Sling Mount This polymer M-LOK rail section with aluminum QD sling mount gives you tons of options for adding accessories to your...$18.49Only$15.72 -
AT3™Sale!
AT3 Tactical Ejector for AR-15 Bolts
Hardened Replacement Ejector for AR-15 Bolts The ejector in an AR-15 bolt is one of the most vital components for consistent reliability. Pushing your spent brass out of the action,... -
AT3™Sale!
AT3 Tactical Hat – Mesh Trucker Cap – Camo
Sunshade, brass deflector, handsomeness enhancer. What more do you want from a hat? Pretty self-explanatory. We went for a good-quality hat that's comfortable to wear on the range while repping... -
AT3™Sale!
AT3 Tactical™ 9mm Bolt Carrier Group – Nitride
High-Quality Black Nitride Bolt Carrier Group For Your 9mm Build This AT3 Tactical™ 9mm Bolt Carrier Group features meticulous machining and a high-quality finish for a lifetime of use. This...$124.99Only$106.24 -
AT3™Sale!
AT3 Tactical AR-15 Front Sight Adjustment Tool
AR-15 Front Sight Tool for A2 and A1 Style Posts Whether your rifle has a fixed front sight base, or if you've picked up a set of backup sights, you...$7.99Only$6.79 -
AT3™Sale!
AT3™ AR-15 Bolt Carrier Group – 6.5 Grendel Type II – Black Nitride
Complete your hard-hitting 6.5 Grendel or 6mm ARC upper with a Black Nitride Bolt Carrier Group Our new 6.5 Grendel Bolt Carrier Group features a black salt bath nitride finish,... -
AT3™Sale!
AT3™ 5.56 NATO Pencil Profile 16 Inch AR-15 Barrel
16 Inch Pencil 5.56 NATO Barrel by AT3 Tactical Upgrade your AR-15 with a 16 inch pencil barrel to improve your handling and save on weight. While the pencil profile...$125.00Only$106.25 -
AT3™Sale!
AT3™ ARO + DELTA Red Dot Kit – Includes Red Dot Sight & 3x...
This kit combines the AT3 ARO Micro Red Dot Sight, and the DELTA 3x Magnifier with Flip-To-Side QD Mount for a versatile, accurate, and lightweight optic setup. This kit saves...$323.99Only$275.39 -
AT3™Sale!
AT3™ .300 Blackout Medium Profile 16 Inch AR-15 Barrel
16 Inch .300 Blackout Barrel by AT3 Tactical A 16 inch .300 Blackout barrel makes swapping to a heavier hitting cartridge in your favorite rifle simple. This 4150 CMV barrel...
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!
Back to top