16" PENCIL, 5.56 NATO, Mid-Length, 4150 QPQ

16" PENCIL, 5.56 NATO, Mid-Length, 4150 QPQ

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Our pencil barrels are the lightest in the industry. Don't take just our word for it, major companies like Robar, Kaiser US, 2A Armament, and others choose Faxon pencils for their ideal balance of weight and performance. 

Faxon Firearms barrels are the pinnacle of value. Manufactured 100% in-house from cradle-to-grave, these barrels are fully stress relieved, air-gauge tested, and 11 degree target crowned to ensure superior accuracy. 

Quality is imbued into our barrels from the start. We start with the best materials, either certified 4150 Mil-Spec steel or 416-R Stainless. From there, each barrel goes through a battery of tests at each operation until finished in Nitride and final inspected. All barrels are individually checked for headspace by precision custom hardened gauges. 

Faxon manufactures all our barrels in Cincinnati, Ohio under our ISO:9001 and AS:9100  quality certifications. 

  • Barrel Material: 4150 CMV Steel
  • Barrel Type: Button Rifled 
  • Barrel Caliber: 5.56
  • Barrel Twist: 1:8
  • Barrel Length: 16”
  • Barrel Profile:  Pencil
  • Barrel Gas System: Mid
  • Inside Finish: QPQ Nitride
  • Outside Finish: QPQ Nitride
  • Muzzle Thread: 1/2-28 TPI (Threads Per Inch) 
  • Gas Block Diameter: .625" 
  • Gas Port Diameter: .078"
  • Gas Block Journal Length: 1.1"
  • Barrel Extension: M4 
  • Weight:  1.20  lbs
  • Magnetic Particle Inspected!
  • 11-degree Target Crown


Returns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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  • light and accurate

    Posted by robert soria on 10th Mar 2017

    This is hands down the best light weight barrel on the market. Buy it...you won't be sorry you did.

  • The reviews are legit!

    Posted by John Schrader on 13th Feb 2017

    Purchased the pencil barrel a few weeks ago building a lightweight coyote night rig. Wanted it light because the night scope weighs 3 lbs. The rifle came out under 10 lbs with the scope.Used Hornady factory ammo 55gr vmax. Sighted it in at 100. entered the ballistic data in the scope. walked a self healing target out to a random distance. Hit the target with the range finder at 258 yards. set the range in the scope shot 3 rounds in a tad under an inch.
    I have much heavier barrels that can't do this.

  • great penicl barrel

    Posted by heisman01@hotmail.com on 1st Feb 2017

    Put this barrel on a skinny AR15 build, added a mlok MI G3 rail and it's insanely light up front. Shot great right out of the box.

  • Best barrel on the market today

    Posted by CTW AMMO on 31st Jan 2017

    Have used a lot of Faxon barrels especially there PENCIL PROFILE BARREL, which meet or exceeds all expectation for accuracy and quality will continue to build on all FAXON barrels

  • Great Barrel, Within 1/2 MOA Precision, Light Weight

    Posted by HHM, Pahrump, NV on 30th Jan 2017

    Used this Pencil Profile barrel plus the corresponding gas block and gas tube offered from Faxon on 4 builds by now - absolutely love them. This barrel is is the finishing touch of a 5.6 lbs. AR 15 build for my wife and "we" love it. Light weight, very precise and helps with the overall balance of her rifle. Very light upfront with most of the weight perfectly centered. I can definitely recommend this product

  • Super Light and Accurate!

    Posted by Jarrod Cook on 12th Jan 2017

    This is my second pencil profile barrel from Faxon, the first has 3,000+ rounds through it and still shoots 1 MOA. Be sure to follow the break in procedure. If you are building an ultralight AR, this barrel is perfect...

  • Fantastic Pencil Barrel

    Posted by Unknown on 28th Nov 2016

    I bought this barrel for a lightweight/home defense build (~6.5 lbs fully decked out). The fit and finish was great. The only think I wish is that there was an option to have the barrel dimpled for the gas block I also bought from Faxon, Please do this!!! Or if you'd sell a gas block jig so I can sweat a little less when I have to dimple the barrel myself.

    The end product I built is a great shooter and pretty accurate for what it is. No problems with any of the ammunition that I've used with it thus far. Definitely love this barrel and I'm looking forward to using more of Faxon's barrels in the future.

  • This barrel makes a poor shooter look like and Gold Medal Olympian

    Posted by David D. on Nov 9th 2016 on 9th Nov 2016

    I recently got a system from Faxon. It’s an AR15 which consisted of a 16” pencil barrel, their new flash hider/ compensator, the Holding Upper and lower, a Faxon bolt carrier assy and a Hyperfire trigger.
    I took it to the range today and shot 5 rounds through it to get it close, I was using a Nikon 3-12x42 power scope shooting at 100yards. I put up a target and took my first shot. Made a quick windage and elevation adjustment then fired 4 consecutive rounds. I had 2 bullseyes and 2 just off dead center. The grouping was 0.950”, the ammo was cheap 30 cent a round Winchester 5.556/.223 ammo in the white box from Field and Stream. I was just laying the gun on my range bag

    Imagine what a good shooter, using match ammo and on sand bags could do. I bet you would hold 1/2MOA

    Thanks Faxon!

  • 16" PENCIL, 5.56 NATO, MID-LENGTH, 4150 QPQ

    Posted by AD on 26th Jul 2016

    Barrel head spacing was correct.
    Barrel length was correct.
    Muzzle threads were correct and crisp.
    Barrel extension was correct.
    Gas port was properly sized for mid-length gas system and located correctly.
    Finish was complete and nice.

    Notes: All in all this is a great barrel, super light, correct to specifications. The value of this barrel is also another great point. I have used more expensive barrels that have the same attention to detail and workmanship as this one. The barrel is surprisingly accurate for its weight and the reduced rigidity found in pencil barrels. would recommend for use.

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