AR-15 Barrels
The AR-15 barrel is one of the most critical parts of your AR-15 – let AT3 Tactical help you find the right AR-15 barrel for your setup.
Barrels come in a variety of lengths, materials, and designs to serve the specific purpose of your weapon. Learn more about AR-15 barrels in our article: Choosing an AR15 Barrel – 5 Things to Consider
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AT3™
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... -
AT3™
AT3™ 9mm Straight Profile 8.3 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 8.3" barrel from AT3™. Crafted from premium 4150 CrMoV... -
AT3™
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... -
AT3™
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... -
AT3™
AT3™ 300 Blackout Medium Profile 7.5 Inch AR-15 Barrel
7.5 Inch .300 Blackout Barrel by AT3 Tactical This 7.5-inch .300 Blackout Barrel makes a great choice for your short, heavy-hitting pistol or SBR AR-15 builds. Made from 4150 CMV... -
AT3™
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... -
AT3™
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... -
AT3™
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... -
AT3™
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.... -
AT3™
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... -
AT3™
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.... -
AT3™
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... -
AT3™
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... -
AT3™
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... -
AT3™
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... -
AT3™
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... -
Rosco Manufacturing Bloodline 16 Inch Midlength Barrel – 5.56 NATO
The Ideal Barrel For Great Balance Of Speed And Performance The Rosco Manufacturing Bloodline 16 Inch Midlength Barrel 556 was designed around the military and law enforcement specifications for an... -
Diamondback Firearms 16 Inch Carbine AR 15 Barrel – 5.56 NATO – 4150 CMV...
Nitride Barrel with 11 Degree Target Crown Low cost and high value components can be hard to come by - luckily, Diamondback Firearms delivers with their barrels. This carbine length... -
AT3™
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.... -
Aero Precision 13.7″ 5.56 Cold Hammer Forged Barrel w/Dimple – Mid-Length
Precise Performance from Aero's 13.7" CHF 5.56 Barrel This 13.7" cold hammer forged 5.56 barrel provides match-grade accuracy and durability for your AR-15 build. Precision mandrel-formed from 4150 CMV steel,... -
Diamondback Firearms 10 Inch Carbine Length AR 15 Barrel – 5.56 NATO – 4150...
AR15 Pistol Barrel at a Great Price If you're looking at building an AR15 pistol, you might be surprised at how much you have to pay for less gun per... -
Diamondback Firearms 16 Inch Midlength AR 15 Barrel – 5.56 NATO – 4150 CMV...
High Value 5.56 Barrel for the Working American Low cost and high value components can be hard to come by - luckily, Diamondback Firearms delivers with their barrels. This midlength... -
Aero Precision 12.5″ 5.56 Cold Hammer Forged Barrel w/Dimple – Mid-Length
Unwavering Performance from Aero's 12.5" CHF 5.56 Barrel This 12.5" cold hammer forged 5.56 barrel delivers match-grade accuracy and longevity to your AR-15. Precision mandrel-formed from 4150 CMV steel, the... -
Aero Precision 16.3″ 5.56 Cold Hammer Forged Barrel w/Dimple – Mid-Length
Precision at Distance with Aero's 16.3" CHF 5.56 Barrel This 16.3" cold hammer forged 5.56 barrel provides match-grade accuracy at a distance for your AR-15 build. Precision mandrel-formed from 4150...
Other AR-15 Upper Receiver Components:
AR 15 Charging Handles
AR 15 Gas Blocks & Tubes
AR 15 Handguards & Quad Rails
AR-15 Barrels
AR-15 Bolt Carrier Groups
AR-15 Front Grips
AR-15 Upper Receivers and Parts
Muzzle Devices
AR-15 Handguard Accessories