FN America 5.56 NATO Cold Hammer Forged Rifle Length Government Barrel - 20"

SKU: FN36424
MPN: FN36424
Manufactured by FN America
1 Reviews



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NOTE: Limit 3 per household. Quantities exceeding 3 will not allow checkout.

We are fully staffed and processing orders. Standard orders are shipping in approximately 2 business day. FFL orders take approximately 14-16 business days if you can provide us an actively receiving FFL location.



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Years of experience producing barrels for the United States military has lead to some of the longest-lived, most accurate rifle barrels available for the AR-15. FN, producer of the world's most battle-proven firearms cold hammer forges high-strength 41V50 chrome moly vanadium barrel blanks to produce rifling and contour in the same go for exceptional repeatability and incredible durability. Each barrel is individually magnetic particle inspected to be free of flaws before having the bore and chrome lined to the same standard as military rifles. Add in a matte-black manganese phosphate finish to protect the outside of the barrel from corrosion and you have a barrel that will outlast most shooters ammo budgets for years to come.

  • Cold hammer forged 41V50 chrome moly vanadium steel
  • Individually magnetic particle inspected
  • Chrome-lined bore and chamber
  • Durable manganese phosphate finish
  • Balanced Government contoured barrel
  • Soft shooting rifle length gas system
  • Standard 1/2x28 threading

FN America is a subsidiary of FN Herstal, a global company with a proud, long-standing heritage. They are committed to providing highest quality, dependable, innovative firearms. With an over 127-year history, Fabrique Nationale stands at the cutting-edge of commercial, law enforcement, and military weapons. Every one of FN America’s firearms are hand tested before leaving the factory to ensure reliability and make sure that the product you receive will work when you need it to.


Barrel CoatingManganese Phosphate
Barrel ContourGovernment
Barrel Length20
Barrel LiningChrome
Barrel Material41V50 Chrome Moly Vanadium Steel
BrandFN America
Caliber Gauge5.56 NATO
Feed RampsM4
Gas Seat Diameter.750
Gas System LengthRifle
Thread Pattern1/2 X 28
Twist Rate1:7

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see www.p65warnings.ca.gov

Ratings & Reviews

1 review

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by -

<br>My friend who is a gun smith recommended FN barrels to me, and they do not disappoint.
<br>Hassle Free installation with a well placed gas port.
<br>Shoots straight as an arrow and drills groupings.
<br>Very high quality.
<br>Will get you props at the range. Never fails to impress.