MPN: 15A58C10NPQ / 15A58M14NPQ / 15A58M16NPQ


  • Pencil profile - ideal balance of weight and performance
  • Lightweight - 10.5-inch version weights at only 0.9 lb
  • Magnetic particle Inspection (MPI), air-gauge tested, and fully stress relieved
  • All Faxon 5.56 NATO barrels are individually checked for headspace
  • Nitride treated inside and out
  • 11-degree target crown to ensure superior accuracy
  • QPQ Nitride corrosion resistant finish

*A barrel that is shorter than 16" is only for use on a pistol configuration firearm or a NFA registered Short-Barreled Rifle (SBR). All NFA laws apply!


  • Caliber: 5.56 NATO / .223 Rem
  • Gas Seat: 0.625"
  • Twist Rate: 1:8 Twist
  • Material: 4150 CMV Steel
  • M4 Feed Ramps: Yes
  • Muzzle Thread Pattern: 1/2"-28 TPI
  • Bore Finish: QPQ Nitride
  • Outside Finish: QPQ Nitride
  • Gas Placement:
    • 10.5-Inch: Carbine-Length
    • 14.5-Inch: Mid-Length
    • 16-Inch: Mid-Length
  • Weight:
    • 10.5-Inch: 14.4 oz.
    • 14.5-Inch: 1 lb 2.4 oz.
    • 16-Inch: 1 lb 3.2 oz.


  • AR-15 upper receivers


When you’re looking for a lightweight barrel for your next AR build, you can’t do better than Faxon Firearms’ 5.56 NATO Pencil Barrel. The refined silhouette of Faxon’s pencil barrel gives you an easy to handle, lightweight barrel that gives the shooter an awesome combination of performance and ease of handling.

The Lightest on the Market with Quality You Can Trust

Faxon’s pencil barrels are among the lightest on the small arms market, and because they’re Faxon barrels they’re made with attention to detail that’s unheard of elsewhere. Faxon manufactures their barrels in-house, from start to finish. That means that from raw 4150 CMV steel blank to the complete Nitride finished 5.56 NATO barrel, the Faxon team takes ownership in the manufacturing and pride in the quality of these barrels.

Industry Pros Trust Faxon

If you have any doubts about the quality of Faxon pencil barrels, look at the industry pros who trust Faxon Firearms to supply them with the barrels they need. Robar, Kaiser US, and 2A Armament all use Faxon barrels in their own builds. Faxon pencil barrels deliver a balance of performance and reduced weight that’s hard to come by elsewhere.

What’s Under the Hood?

When you buy a Faxon pencil profile barrel you get quality performance that you can rely on. Whether you choose a 16-inch rifle barrel, a 14.5-inch mid length barrel or a 10.5-inch barrel for a special build, you know that you’re getting a quality barrel that features 1:8 button rifling that will stand up to as many rounds as you care to send down range. QPQ Nitride finishes inside and out make Faxon barrels nearly impervious to the effects of weather and corrosive propellants. Each Faxon barrel is Magnetic Particle Inspected and headspaces are individually checked to assure quality performance over a long, worry-free service life.

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