Diamondback Firearms 10 Inch Carbine Length AR 15 Barrel – 5.56 NATO – 4150 CMV QPQ

SKU: DB556C10M60B8

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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 inch than standard-length guns.  Diamondback Firearms offers this high-value barrel to complete your next AR15 pistol build.  It features 4150 CMV steel with black nitride finish to prevent wear and corrosion, and a 1-8 twist for broad ammunition compatibility for 5.56 NATO cartridges.  If you’re in need of a handguard that fits just right for this length, try our 9″ SPEAR M-LOK handguard.

  • Length: 10 Inches
  • Threads: 1/2×28
  • Gas Block Shoulder: .750″
  • Gas Port: Carbine
  • Barrel Profile: Government
  • Twist: 1-8
  • Material: 4150 CMV Steel
  • Finish: Black Nitride/QPQ


Caliber5.56 NATO/.223 Remington
Barrel Length10 inches
Barrel Twist Rate1:8 inches
Barrel Material4150 CMV
Muzzle Threads1/2/2028
Barrel FinishBlack Nitride
Gas Block Size.750″ Gas Block
Barrel ProfileGovernment
Barrel Gas SystemCarbine
Gas Block Journal Length1.9 inches
Barrel ExtensionM4

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.

Limited Lifetime Warranty

  • This “Limited Lifetime Warranty” has been drafted to comply with the MAGNUSON-MOSS WARRANTY FEDERAL TRADE COMMISSION IMPROVEMENT ACT which is effective for goods manufactured on or after December 31, 1976. DIAMONDBACK FIREARMS, LLC. warrants that this firearm was originally manufactured free from defects in material and workmanship.
  • DIAMONDBACK FIREARMS, LLC. agrees to correct any defect in material and/or workmanship for the original purchaser by repair or replacement ONLY. PROOF OF PURCHASE IS REQUIRED. A service or handling charge may be applied at the company’s discretion.
  • DIAMONDBACK FIREARMS, LLC. will not be responsible for defects resulting from careless handling, unauthorized adjustments or modifications, corrosion, neglect, abuse, failure to provide reasonable and necessary maintenance as described by this owners manual.
  • Damage caused by hand loaded and/or reloaded or improper ammunition or damage caused by firing with any obstruction in the barrel will not be warranted.
  • This warranty does not apply to ordinary wear and tear of any parts, including metal, plastic, or any other material used to manufacture this product, as well as all surface finishes.
  • Diamondback does not warranty aftermarket parts or damage or issues caused by them.
  • Under no circumstances shall DIAMONDBACK FIREARMS, LLC. be responsible for incidental or consequential damages with respect to economic loss or injury or property damage, whether as a result of a breach of an express or implied warranty, negligence or otherwise.
  • Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply in certain cases.

Illegal Configuration

Diamondback reserves the right to report illegal configurations to the ATF for guidance. Please ensure all NFA parts or modifications have the proper paperwork associated with them prior to shipment. This includes short barrel rifle configurations.

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

Customer Reviews

Based on 5 reviews
Miguel Rangel

Great barrel arrived extremely fast super happy with the service can't wait to finish my build at take it to the range

Alejandro Gonzalez

Definitely recommend this barrel 👌

Michael Kinder

Both items were of superb quality at a low reasonable price. Website is very user friendly

Pierce Ward

Diamondback Firearms 10 Inch Carbine Length AR 15 Barrel - 5.56 NATO - 4150 CMV QPQ

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

Amazing value

So pleased with the accuracy and durability of the product. Amazing customer service as well

Thanks for sharing your feedback! We're glad you're satisfied with your purchase. Cheers!