Ballistic Advantage 18″ .350 Legend Performance AR15 Barrel – Carbine – SPR Profile

SKU: BABL350002F

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Duramag 20 Round 350 Legend Magazine for AR-15 - Stainless Steel - AT3 Tactical

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BA 18 Inch .350 Legend SPR QPQ Carbine Barrel

Shoot a big bore caliber out of your AR15 with a simple barrel swap with the BA 18 Inch .350 Legend SPR QPQ Carbine Barrel. One of the best features of the 350 Legend is that it doesn’t require too many special components.  You use a standard 5.56 bolt carrier group, a .750″ gas block, and a Carbine gas tube.  For better reliability with the straight-walled 350 Legend cartridge, make sure to use a magazine specific to the caliber.

Ballistic Advantage is committed to making the kind of barrels that delight the most demanding users. Users expect a barrel that delivers round after round consistently, accurately, and with minimal recoil. The barrel provides true and reliable performance no matter how hot the action or how gritty the conditions are.

.350 Legend

The .350 Legend is a top choice for hunting large game and making big holes in targets. The .350 Legend is perfect for states that legally require straight-walled cartridges for hunting. Not to mention the only parts of an AR15 that need to be changed for .350 legend are the barrel and magazine.

IMPORTANT: A standard 5.56 1/2×28 flash hider will not have enough clearance for a .350 round to pass.
Use a 9mm 1/2×28 muzzle device or one designed for .350 Legend rounds.
Before installing a muzzle device, ensure a .350 Legend round will drop freely through the muzzle device bore.

SPR Profile

A carbine-length gas system, 18″ barrel length, and the Special Purpose Rifle (SPR) profile makes recoil smooth and ideal for tactical applications. The Special Purpose Rifle was developed to give operators a weapon to fill multiple roles such as a close-quarters and precision weapon.

Ballistic Advantage’s SPR Profile is made with a profile that steps down in diameter with the muzzle being the thinnest part of the barrel. This unique design saves weight where possible while making areas such as the chamber and gas block area reinforced for accuracy and heat mitigation.

Additionally, this barrel is precision machined from 4150 Chrome Moly Vanadium with a QPQ Corrosion Resistant Finish. Stainless steel is easy to clean and maintain and resistant to the elements. QPQ is a corrosion-resistant finish against rust, general wear and scratches, and other factors that may lead a barrel to become prematurely unserviceable.

The Ballistic Advantage

Ballistic Advantage excels at barrel production and pays attention to the small details that make them a step above the rest. Details include nickel boron-coated feed ramps, incredible quality control, and a sub Minute of Angle (MOA) accuracy guarantee with match-grade ammunition. Stainless Steel material makes this barrel easy to clean and resistant to the elements.

Ensuring the best in quality and accuracy, Performance Series Barrels are MPI-tested and top-of-the-line for new shooters and professionals alike.


  • Brand: Ballistic Advantage
  • Model: Ballistic Advantage 18″ .350 Legend Performance AR15 Barrel – Carbine – SPR Profile
  • Manufacturer Part Number: BABL350002F
  • Length: 18″
  • Material: 4150 Chrome Moly Vanadium
  • Finish: QPQ Corrosion Resistant
  • Profile: SPR
  • Twist Rate: 1:16″
  • Gas System Length: Carbine
  • Gas Block Journal:  .750″
  • Threading: 1/2×28
  • Weight: 41 oz


Caliber.350 Legend
Barrel Length18 inches
Barrel Twist Rate1:16 inches
Barrel Material4150 CMV
Muzzle Threads1/2/2028
Barrel FinishBlack Nitride
Gas Block Size.750″ Gas Block
Barrel ProfileSPR
Barrel Gas SystemCarbine
Gas Block Journal Length1.9 inches
Barrel ExtensionM4
Weight41 ounces

Have Questions About this Product?

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

Ballistic Advantage Warranty!

If for any reason you have a warranty issue with one of our products, please describe your situation, include your name and order number or transaction ID. One of our technical specialists will then review your claim and contact you within 5-7 business days.

PLEASE NOTE: We cannot provide warranty work if your items have been altered by you or anyone other than Ballistic Advantage from their original state.

Please call 407-347-4584 if you have any questions regarding this policy.

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.