Yankee Hill Machine 9mm AR-15 Barrel - 5.5"

Manufactured by Yankee Hill Machine
Manufactured by Yankee Hill Machine
(0) No Reviews yet

In Stock

NOTE: Limit 1 per household. Quantities exceeding 1 will not allow checkout.

We are fully staffed and processing orders. Standard orders are shipping in approximately 1 business days or less. FFL orders take approximately 20 business days or less if you can provide us an actively receiving FFL location.



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 Yankee Hill Machine 9mm AR-15 Barrel is machined from 4140 chrome moly steel and Melonite finished inside and out to provide a harder than chrome surface with decreased friction coefficient and excellent corrosion resistance. At 5.5” in length it features a 1:14 twist rate and an medium profile. It is threaded 1/2x36 for use with your favorite 9mm muzzle device.

  • 5.5” barrel chambered in 9mm
  • 4140 chrome moly steel
  • Melonite finished
  • Blowback
  • 1:14 twist rate
  • Threaded 1/2x36
  • Weight: .68 lbs.

Yankee Hill Machine stands by their products and meticulously inspect each product before they ship it out. Their quality assurance program adheres to strict military standards and use the most modern equipment. Not only are is the inspection equipment state of the art, but they manufacture their own tools to make sure that each part is machined precisely the way it needs to be. They have a highly skilled and diverse workforce that is committed to insure your satisfaction 100%.
See More


Barrel CoatingMelonite
Barrel ContourMedium
Barrel Length5.5
Barrel LiningMelonite
Barrel Material4140 Chrome Moly Steel
BrandYankee Hill Machine
Caliber Gauge9mm Luger
Feed RampsColt/Glock
Gas System LengthBlowback
Thread Pattern1/2 X 36
Twist Rate1:14
Weight.68 lbs.

Ratings & Reviews

No reviews available

Be the first to Write a Review