Ballistic Advantage Modern Series 5.56 AR-15 Barrel Gov. Carbine - 12.5"

Manufactured by Ballistic Advantage
SKU: BABL556024M
MPN: BABL556024M
Manufactured by Ballistic Advantage
5 Reviews

In Stock

Standard orders will ship out the same business day if ordered by 3:30 pm CST. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.



The National Firearms Act regulates the configurations of some firearms assembled with barrels under 16” long. Know the NFA laws in your state before purchasing this item.

Chambered in 5.56 NATO, this Ballistic Advantage 12.5” barrel is a great option for building a short barrel rifle or even a pistol. This modern series barrel features all the qualities you would want for a short carbine style build. It features a carbine length gas system for optimal reliability with the commonly used 62 grain projectiles which are also optimal with the 1:7 twist rate. The barrel is made from 4150 Chrome Moly Vanadium and is fully salt bath Nitride finished inside and out for long term durability. The government profile is thin behind the gas block shelf to reduce weight but then gets larger to accommodate .750” gas blocks. Threaded 1/2x28, you can easily attach your favorite .223/5.56 muzzle device whether it is a flash hider or muzzle brake. If you are building a high quality AR-15, you can’t go wrong with the Ballistic Advantage Modern Series 5.56 barrel.

  • 12.5” barrel length with government profile
  • Machined from 4150 Chrome Moly Vanadium
  • QPQ salt bath Nitride finish
  • Carbine length gas system with .750” shelf
  • 1:7 twist rate optimal with 62 grain bullets
  • 1/2x28 threaded
  • M4 feed ramp extension

Ballistic Advantage proudly produces quality AR barrels that exceed very stringent demands. Their AR-15 barrels surpass the competition in precision and aesthetics. For barrels that deliver round after round consistently and accurately, choose Ballistic Advantage.
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Barrel CoatingSalt Bath Nitride
Barrel ContourGovernment
Barrel Length12.5
Barrel LiningSalt Bath Nitride
Barrel Material4150 Chrome Moly Steel
BrandBallistic Advantage
Caliber Gauge5.56 NATO
Feed RampsM4
Gas Seat Diameter.750
Gas System LengthCarbine
Thread Pattern1/2 X 28
Twist Rate1:7
Weight22 oz

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

Ratings & Reviews

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This Is What I Needed!


I bought mine before PA carried this model/length and I couldn't be happier. The fit and finish is superb! I had to dimple the barrel for the gas block ( I have a jig ) and it took a long time as that steel is HARD. I gave it a brief break-in and got great groups right from the start. I'm currently shooting it with a LANTAC Dragon, Superlative Arms gas piston system and a Fostech Echo binary trigger and the brass really flies but I can find nothing to fault about this Aero Precision (group) barrel. At the current sales price, it is a steal!

great performer and value


This is my first product from BA but wont be my last. I've put together quite a few AR's and really have taken to Aero Precision lately. They use BA with their assembled uppers, but for my last build there were none available. So I pieced it together. With the 12.5" on my pistol and a Bushnell 1-4 FFP I'm having no problem doing sub 2" groups at 100 with XM193. this is better than most of my other guns, all of which will shoot sub MOA with match ammo. I haven't fed this one anything but xm193, but have no doubts it with tighten up with better ammo. Very pleased! Primary arms was great to work with as always. I try to buy here first, going elsewhere only when absolutely necessary.


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Great barrel for my AR pistol.

Great barrel

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Awesome barrel. Fit and finish are on point t. Haven’t shot yet but I’m sure it’s going to be just as expected.

Great barrel

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I used this barrel on an SBR build. Quality performance, excellent ballistics, accurate! <br>Highly recommend this.