Precision Defense 5.56 NATO AR-15 Barrel - Mid-Length - Nitride - 14.5"

Manufactured by Precision Defense
SKU: PD-145-556-MID-NIT
MPN: PD-145-556-MID-NIT
Manufactured by Precision Defense
2 Reviews

In Stock

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Precision Defense AR platform barrels are designed to provide reliable and consistent performance as well as excellent longevity. This 14.5-inch 5.56 NATO AR-15 barrel is drilled, reamed, and button rifled to meet SAAMI Specifications, and profiled and chambered with extreme precision. This barrel features 1:7 twist rate and excellent accuracy and repeatability for thousands of rounds, while the medium profile and 14.5" overall length (from breech face to muzzle) make it the ideal choice for a wide range of shooting applications. Also features a mid-length gas system for an improved shooting experience.


  • 14.5 inch 5.56 NATO barrel
  • 4150/4151 CrMoV steel construction
  • Black nitride finish
  • 1/2x28 threaded muzzle
  • Mid-length gas system
  • Medium profile
  • 1:7 rate of twist
  • Made in the United States
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Barrel CoatingSalt Bath Nitride
Barrel ContourMedium
Barrel Length14.5
Barrel LiningSalt Bath Nitride
Barrel Material41V50 Chrome Moly Vanadium Steel
BrandPrecision Defense
Caliber Gauge5.56 NATO
Feed RampsM4
Gas Seat Diameter.750
Gas System LengthMid-Length
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

Ratings & Reviews

2 reviews

  • 4 stars
  • 0 reviews
  • 3 stars
  • 0 reviews
  • 1 star
  • 0 reviews

High Quality- arrived with a rusty-corroded bore - requires heavy cleaning

by -

High Quality Barrel, but arrived with a rusty-corroded bore, spent an hour cleaning but will require significantly more heavy cleaning, seems the salts from the salt bath nitrocarburizing process were left in the barrel at the factory, and has caused rust to eat into the barrel. May try another one, not sure yet.

Note : We are happy to get that issue resolved and are processing that as quickly as we can. Please let us know if there is anything else we may assist you with.

14.5 AR 15

by -

I picked this barrel up at a very good price. The shipping was very good and the barrel looked very nice and got it mounted and went to the range. Results of the range trip were very impressive as at 50 yards it grouped uner 1/2" . That is all I could shoot as I have to go further away to get a longer range. I love it so far and for a buget part it is well worth it. Thanks, great service as always!