Ballistic Advantage 300 Blackout AR-15 Barrel Modern Series Pistol Nitride -10.5"

Manufactured by Ballistic Advantage
SKU: BABL300008M
MPN: BABL300008M
Manufactured by Ballistic Advantage
3 Reviews
No Longer Available



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.

The Ballistic Advantage Modern Series 300 Blackout barrel combines the durability and strength of 41V50 chrome moly vanadium steel with the exceptionally corrosion resistant salt bath nitride treatment. This provides not only an impressive barrel life but ensures excellent accuracy and an affordable price. Every Ballistic Advantage barrel is guaranteed to give sub Minute of Angle accuracy with match grade ammunition. This 10.5” .300 BLK barrel features the Distinct Rigid Pattern (DRP) contour and is ready to accept your favorite .750” gas block. Only weighing in at 19 ounces, you can build the perfect .300 BLK pistol or SBR and attach your favorite suppressor.

  • Machined from 41V50 Chrome Moly Vanadium Steel
  • Salt bath Nitride finish
  • Tapered profile reduces weight without sacrificing rigidity
  • Threaded 5/8x24 for suppressor use or another muzzle device
  • Pistol length gas system and 1:7 twist optimal for subsonic .300 BLK rounds
  • 5R rifling
  • Weight: 19.0 oz

This 10.5” Ballistic Advantage .300 Blackout barrel is 5R rifled which provides more consistent lands and grooves leading to more consistent accuracy. The pistol length gas system and 1:7 twist rate is optimal for reliably running a wide assortment of ammunition types. However, if running suppressed, an adjustable gas block will make tuning your rifle to specific loads extremely easy. This barrel uses a .750” gas block journal for compatibility with multiple different brands of adjustable gas blocks, so you can build a reliable .300 Blackout AR.

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 ContourDistinct Rigid Pattern
Barrel Length10.5
Barrel Material4150 Chrome Moly Steel
BrandBallistic Advantage
Caliber Gauge300 Blackout
Feed RampsM4
Gas Seat Diameter.750
Gas System LengthPistol
Manufacturer.Ballistic Advantage
Thread Pattern5/8 X 24
Twist Rate1:7
Weight19 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

3 reviews

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No dimple for gas block


Quite surprisingly there is no dimple for the gas block. So if you are using a set screw block and would like a dimple for security and easy of installation then it will cost you more money and time to get that done.

Excellent Barrel - You Cannot Go Wrong with BA Barrels


This is my 10th Ballistic Advantage barrel. From .308 to 10.3 Hanson SBR, every barrel I’ve purchased is high quality. BA is one of the few barrel manufacturers that offers a sub-MOA guarantee. This barrel is BA’s Modern series and it geared toward budget minded. But don’t let that fool you, it still shoots true, but it’s not a precision barrel and it’s not meant to be, however the fit and finish quality is very evident.
<br>Ref: the reviewer who dinged the barrel because it wasn’t dimpled - if the barrel is purchased from BA directly they offer to dimple. The BA Hanson profile barrels come dimpled with GB installed. Also Primary Arms did not indicate the barrel was dimpled not does BA. It’s a shame people can’t review the product for its actual performance instead of whining about a feature that was not even advertised.

Excellent service and item.

by -

Just received my 10.5" 300 BLK OUT barrel today and it is very nice and exactly as described, Primary Arms shipped fast and they really know how to take care their customer. I will buy more items from Primary Arms because of their excellent service. I will update once I go down range.