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Rosco Manufacturing K9 5.56 NATO Barrel & Hatchet Intermediate Length AR-15 Barrel - 16"

Manufactured by Rosco Manufacturing
SKU: K9-16-HY-556-7-I
MPN: K9-16-HY-556-7-I
Manufactured by Rosco Manufacturing
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The Rosco Manufacturing K9 is a 16-inch barrel chambered in 5.56 NATO designed for AR-15 platforms. This intermediate length gas system barrel features an optimized gas port for reliable function with or without a suppressor. The K9 continuous taper profile prioritizes heat dissipation during heavy use. By shifting weight towards the rear of the barrel, this design also improves balance for better handling, especially with the addition of attachments to the front of the rifle.


  • Chambered in 5.56 NATO
  • 416R stainless steel construction
  • Nitride finish
  • 1/2x28 barrel threads
  • Continuous barrel profile
  • Intermediate gas length
  • 0.750 gas block size
  • Recessed target crown
  • Length: 16”
  • Weight: 34.5 oz.

The K9 boasts an updated target crown inherited from Rosco's Purebred series, promoting improved harmonics, fit, and finish. It includes an intermediate length gas tube.

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Barrel CoatingSalt Bath Nitride
Barrel Length16
Barrel LiningSalt Bath Nitride
Barrel Material416R Stainless Steel
BrandRosco Manufacturing
Caliber Gauge5.56 NATO
Compatible Make
Compatible Model
Feed RampsM4
Gas Seat Diameter.750
Gas System LengthIntermediate
Thread Pattern1/2 X 28
Twist Rate1:7
Weight34.5 oz.
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

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