Diamondback Firearms 6.5 Grendel AR-15 Barrel - Mid-Length - Nitride - 18"

Manufactured by Diamondback Firearms
SKU: DBB65M18M50B8
MPN: DBB65M18M50B8
Manufactured by Diamondback Firearms
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Orders will be shipped from a remote warehouse within two business days. Estimated delivery time will be 7-10 business days



The Diamondback Firearms 6.5 Grendel AR-15 Barrel is machined in house on state-of-the-art CNC machines and are thoroughly inspected at multiple stages of the build process to ensure quality. This 18” barrel is machined from 4150 Chrome Moly Vanadium Steel and is 6 groove button rifled to ensure consistent accuracy and has a 1:8 twist rate. The mid-length gas system is optimal for reliability and smooth cycling. It is threaded 5/8x24 and features an 11-degree target crown. The final process is a salt bath Nitride finish for an added layer of protection.


  • 18” barrel chambered in 6.5 Grendel
  • Machined from 4150 CMV steel
  • Salt Bath Nitride finish
  • Mid-length gas system
  • 1:8 twist rate
  • 6 groove button rifled
  • 11-degree target crown
  • Threaded 5/8x24
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Barrel CoatingSalt Bath Nitride
Barrel ContourMedium
Barrel Length18
Barrel LiningSalt Bath Nitride
Barrel Material4150 Chrome Moly Steel
BrandDiamondback Firearms
Caliber Gauge6.5 Grendel
Gas Seat Diameter.750
Gas System LengthMid-Length
Thread Pattern5/8 X 24
Twist Rate1:8

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