FN America 5.56 NATO Cold Hammer Forged Rifle Length Government AR-15 Barrel - 20"

Manufactured by FN America
SKU: FN36424
MPN: FN36424
Manufactured by FN America
6 Reviews
$349.00

In Stock

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Details

Details

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.

Features:
  • 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.
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Specifications

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
PlatformAR-15
Thread Pattern1/2 X 28
Twist Rate1:7
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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Ratings & Reviews

6 reviews

3.8
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10/10

by -

10/10

My friend who is a gun smith recommended FN barrels to me, and they do not disappoint.
Hassle Free installation with a well placed gas port.
Shoots straight as an arrow and drills groupings.
Very high quality.

Will get you props at the range. Never fails to impress.

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Pretty good

by -

The barrel itself is great and very accurate. I was able to get groups ranging from 0.36 to 1.15 moa at 600 yards with 77 grain ammo (wind started kicking up and I have a lot to learn about shooting). I did have an issue with the gas port being too small. It comes at about 0.09 inches and I had to widen it out to about 0.1 inches to get the bolt to lock back. It's not a huge deal once you know what is the problem, but it cause a lot of consternation trying to figure it out.

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Shoots great, once or twice

by -

The barrel had no cosmetic issues and shoots great. I don't shoot well enough to measure MOA with any consistency but it appeared to group as expected. Unfortunately it wouldn't feed consistently in my rifle. After a lot of investigating and eventually taking apart the FSB, I discovered the gas port was a few thousandths undersized (~.091). I had to purchase a #42 drill bit (.0935) and drill out the gas port to bring it to spec for a rifle length gas system. After doing that it works great. This is a pretty major QC issue in my opinion. For anyone else reading this, SPEC YOUR GAS PORT before installing your gas block/FSB, you will not regret it.

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good barrel

by -

very nice barrel shoots great.

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Wrong barrel, right package

by -

Received a button cut barrel in a HF box and bag.

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FN Hammer forged 20 inch barrel

by -

This should last a long time with the hammer forging and chrome lined rifling. Can't wait to shoot through.

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