AR15 Barrels - Selectable Length, Barrel Profile, Gas System and Options

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Aero Precision 5.56 NATO barrels are the perfect addition to your AR15 build.  Select barrel length, gas system, barrel profile, and from available pinned Front Sight or muzzle devices.

Ready: Pick Your Starting Point.

The first thing on your gear list is the gear focus. From shotgun cleaning kits to a Shockwave home defense pack, or even a steel target system, we've created the perfect starting points to accommodate a variety of situations, needs and adventures - and the list keeps on growing.

Set: Add Items To Your Bundle.

Next, is to assemble your bundle by scanning the different gear options. If it's a cleaning kit you're building, you may see a variety of options for brush calibers, solvents, and even cleaning pads. The gear options are shown in tiles and you simply need to click “Add to Bundle” for the items you need. Additional gear information will appear if you click the 'i' in the top left of the gear tile. Keep in mind, the more gear you select, the more you save. And as you grow the number of items in your bundle your discount will be shown in the top right of the screen. Here's how discounting works:

  • $25-$50 combined orders receive 5% off and free shipping!
  • Combined orders over $50 receive 15% off and free shipping!

Bundle!: Add To Cart & Purchase.

Once you add the first item to your bundle, a status bar will appear at the top showing the number of items in your bundle, a button to view your bundle summary, and sum of your building discount. At the bottom of the screen, you'll see the bundle price and simply click "Add to Cart" once your bundle is built.

And of course, if you need additional help with buidling your own custom bundle, don't hesitate to contact us.

Product Description

Inventory is in short supply. We are taking orders and will manage a backorder list. Most items ship within 4 weeks.

Crafted to mil-spec standards from 4150 Chrome Moly Vanadium with a QPQ corrosion resistant finish, all Aero Precision barrels provide time tested precision and accuracy for your AR15 pistol length build.

All barrels feature:

  • 5.56 NATO chamber
  • Button rifling with a twist rate of 1:7"
  • QPQ corrosion resistant finish
  • 1/2-28 muzzle threads
  • HP and MPI tested
  • Assembled with M4 Barrel Extension and Indexing Pin

Gas port sizes:

  • 7.5" Pistol:  .0635
  • 10.5" Carbine:  .0785
  • 11.5" Carbine:  .0730
  • 12.5" Carbine:  .0700
  • 14.5" Carbine:  .0635
  • 14.5" Mid-length:  .0785
  • 16" Carbine:  .0635
  • 16" Mid-length:  .0785
  • 18" Rifle:  .0935
  • 20" Rifle:  .0890


  • All barrels have a .750 Gas Block journal diameter except barrels with the Pencil profile.  Pencil barrel profiles require a .625 diameter gas block.
  • 14.7" pencil barrel can be pinned with a standard A2 Flash Hider, and yield a 16" overall barrel length
  • 14.5" barrels with pinned and welded VG6 GAMMA 556SL and VG6 EPSILON 556SL yield a 16+" overall length
  • Both the VG6 GAMMA 556SL and VG6 EPSILON 556SL have a .745" outside diameter, permitting full maintenance and removal of your gas block without having to remove the muzzle device
  • Pinned Front Sight Base configurations come with a Barrel Nut and Handguard Cap, but do not include a Front Sight Post


  • Rifling: button rifled 1 turn in 7"
  • Muzzle threads: 1/2-28
  • M4 Barrel Extension with Indexing Pin
  • 4150 Chrome Moly Vanadium material with QPQ corrosion resistant finish

Aero Precision USA
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1.5 lbs
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