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Faxon Barrel [Review]: 14.5″ Pencil with Permanently Attached Muzzle Brake

Want the lightest/shortest AR-15 barrel? The Faxon 14.5" Pencil is the answer at 18 oz. We quickly cover accuracy, general shootability, cost, and more.

    Looking for the lightest barrel possible for your AR-15?  Or not sure exactly how to permanently attach a muzzle device to a 14.5″ barrel?

    Then the Faxon 14.5″ Pencil Barrel with a Permanently Attached 3 Port Brake ($260) is the key.

    Lightweight Upper Build, Faxon and Brigand Arms
    Lightweight Upper Build, Faxon and Brigand Arms

    I’ll walk through my lightweight build, why the Faxon barrel is so awesome in terms of weight savings and pinning, accuracy tests, general shootability, and more.

    About the Faxon 14.5″ Pencil Barrel

    For me, the Faxon barrel solves three big problems all at once…

    1.  Ultimate Weight Savings

    A normal 16″ profile barrel (Government) can weigh up to 2 lbs (32 oz), but by going the “pencil” profile you dramatically shave off tons of weight.  Losing weight from heavy steel is a lot easier than losing aluminum in your upper and lower.

    The 14.5″ barrel weighs in at 18.4 oz!!!

    And when combined with the Brigand Arms Carbon Fiber Handguard ($300, 4 oz)…you’ve got some serious weight savings.  See our Lightest Handguards article for more choices.

    2.  Minimum Length

    However…when you go 14.5″ you can run afoul of laws which require minimum length to be 16″.  Sometimes even owning a sub 16″ barrel without adequate paperwork is illegal.

    That’s why it’s so great that Faxon offers already pinned/welded 14.5″ barrels with muzzle devices that bring it up to that magical 16″ number.

    Faxon 14.5 Pencil Weld
    Faxon 14.5 Pencil Weld

    With a muzzle brake it weighs in at 19.52 oz.  There’s also the option of flash hider too.

    And I actually like how the weld is not covered up…makes it much easier to show that it is indeed permanently attached.

    3.  Changing of Gas Blocks & Barrel Nuts

    And when you have a permanently attached muzzle device…it’s usually too thick to allow re-installation of a new gas block.  So the one you have when you attached it is the one you’re stuck with forever.  Same thing with some barrel nuts.

    Superlative Arms .625 Gas Block over Pinned Faxon Pencil 14.5
    Superlative Arms .625 Gas Block over Pinned Faxon Pencil 14.5

    Faxon had the genius idea to make the muzzle device the same thickness as everything else you’d add…so now you can change up your gas blocks and nuts all you want.  Shown with a .625 inch Superlative Arms adjustable gas block (full review).

    Installed Superlative Adjustable Gas Block on Faxon 14.5 Pencil
    Installed Superlative Adjustable Gas Block on Faxon 14.5 Pencil

    Who Is It For?

    To sum up, the Faxon is perfect if you are…

    • Looking for the lightest barrel
    • Looking for the shortest barrel without having to deal with regulatory stuff
    • Don’t want to permanently attach a muzzle device yourself
    • Want the freedom to change up gas blocks or handguards on a pinned 14.5″ barrel

    Check out our full review of Faxon’s 16″ pencil barrel if you want a more “regular” lightweight solution.

    Faxon 16" Pencil Barrel
    Faxon 16″ Pencil Barrel

    Or their proprietary profile…the Gunner which pulls together the best of the standard M4/Government profile and pencil characteristics.

    Faxon Gunner vs Pencil
    (T to B) Faxon Pencil vs Gunner

    Fit, Feel, & Install

    It is so tiny and light…my wife thought it was for a toy gun when it came in the mail.

    Faxon Pinned 14.5 Pencil Twist
    Faxon Pinned 14.5 Pencil Twist

    Cosmetically it was perfect (unless you count the weld), and it was a breeze to install if you have the right tools and instructions (How to Build an AR Upper).

    Tightening Faxon 14.5 to Brigand Arms Barrel Nut
    Tightening Faxon 14.5 to Brigand Arms Barrel Nut

    Now on to the good stuff!

    How it Shoots

    I cleaned the barrel the night before to get rid of any oil/preservatives from the factory.  And shot 80 rounds of PMC Bronze while standing and using a Sparc AR red dot ($199) on my special edition Pew Pew Aero Lower ($105).

    Lightweight Build Brigand Arms and Faxon Pencil 14.5 Pinned
    Lightweight Build Brigand Arms and Faxon Pencil 14.5 Pinned

    I tweaked the adjustable gas block which greatly helped lower the felt recoil…since one of the negatives of going super lightweight is less mass to absorb recoil.  Having a lightweight BCG ($250) and mid-length gas system doesn’t hurt either.

    It took a few 10 round mags to get used to the lightweight-ness…but soon I was able to nail the 100 yard gong with ease.

    I didn’t have a chance to run and gun (I’ll be using it for my next comp) but standing and making transitions was soo much easier with the weight reduction.


    After some breaking in, I went with my standard testing equipment that tries to take all my shooting skill out of the equation:

    Ammo Testing for Faxon 14.5 Pinned Pencil Barrel
    Ammo Testing for Faxon 14.5 Pinned Pencil Barrel

    I zeroed in on the 25 yard line, did some 10 round chronograph testing, waited for the barrel to be cool enough to hold, and then shot 10 rounds at 100 yard targets.

    I shot at a leisurely pace of roughly 1 shot every 10 seconds.

    Testing with Chrono and 25 and 100 Yards
    Testing with Chrono and 25 and 100 Yards

    I waited for the barrel to cool down between each set of different ammo.  One thing I must say with pencil barrels is that it really heats up fast!  But it also cools down pretty quickly too (I’d estimate 3-5 minutes).


    Faxon 14.5 Pinned Pencil Accuracy Tests
    Faxon 14.5 Pinned Pencil Accuracy Tests

    Just by looking, it seems that PMC Bronze takes the lead in terms of accuracy…even beating out the much more expensive Gold Medal match ammo.  It seems the 1/8 barrel twist likes the normal 55 gr instead of the heavier 69 gr.

    One thing to note is that with Wolf Gold (which usually shoots hotter than PMC), there’s missing shots on the target.  I remember being confused on my last few shots until I looked closer…

    Faxon 14.5 Pinned Pencil Wolf Gold
    Faxon 14.5 Pinned Pencil Wolf Gold

    It looks like the groups really opened up and started hitting the cardboard.

    X-TAC was ok and Gold Medal faired a little better.  Looks like the barrel likes the slightly slower .223 compared to 5.56 rounds.  US Quarter is ~1 inch.

    Closeup Faxon 14.5 Pinned Pencil Groups
    Closeup Faxon 14.5 Pinned Pencil Groups


    I also wanted to see how much velocity was lost by going to the shorter 14.5″ barrel.

    PMC: Average 2742 ft/sec, Standard Deviation: 24 ft/sec.  Compared to my average of 2900 ft/sec in a 16″ barrel

    X-TAC: Average 2885 ft/sec, Standard Deviation: 31 ft/sec.  No previous averages for my other barrels.

    Wolf Gold: Couldn’t get any readings…it was super weird…I tried Wolf right after the PMC and again after X-TAC and got errors on my chronograph.  Too fast man, too fast.

    Verdict: There’s decent loss that will have drop-off issues at longer ranges (300 yards+).


    • Barrel Material: 4150 GBQ Steel
    • Barrel Type: Button Rifled
    • Barrel Caliber: 5.56
    • Barrel Twist: 1:8
    • Barrel Length: 16.1”
    • Barrel Profile: Pencil
    • Barrel Gas System: Mid
    • Inside/Outside Finish: QPQ Nitride
    • Gas Block Diameter: .625″
    • Barrel Extension: M4
    • Weight: 19.52 Ounces
    • Magnetic Particle Inspected


    Faxon 14.5 Pencil Side
    Faxon 14.5 Pencil, Side

    To sum up…the Faxon 14.5″ Pencil Barrel solves a lot of problems if you’re looking for a lightweight/short build.  Unless you’re shooting bench for accuracy or really far distances, the Faxon’s positives should outweigh the negatives.

    I’m pretty happy with the results..especially since Faxon is affordable.

    And to thank you for reading to the end…Faxon is hooking up readers with a 10% off barrels code:  FXPPTBARREL10

    I initially was “meh” about them but I’ve only heard good things about them from fellow competitors.  Mostly it was along the lines of “great prices and good performance.”

    So it looks like they were right.

    How have your experiences with Faxon been…anyone also try out their pinned series?

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    8 Leave a Reply

    • Commenter Avatar
      Billy Bob

      I have a similar non-match faxon pencil profile barrel, with regular old m193 it's a pretty solid 2MOA shooter. When it gets hot (20rds + fairly quickly) it opens up to about 3MOA, but also cools fairly fast. I recently discovered that my particular barrel really likes AAC 75gn, so much so that I managed to shoot a 0.6MOA 10rd group with the stuff at 200 yards. A 1.2in ten shot grouping from a well supported prone. Made my day. I've had the barrel for just over three years now, put about 2.5k rounds through it to include training, a Haley strategic carbine class and local competitions.

      I'm not sure all of their barrels will do that, but I also have another faxon gunner profile 18in 308 AR10 that shoots 0.5 MOA with tuned hand loads(found using the optimal charge weight method) Also opens up with heat, more so even, but it shoots barely under 1MOA with federal 178 GMM as well, so fluke or not. I like their barrels quite a bit. It's no LARUE, but it's good enough for me.

      March 28, 2023 10:55 pm
    • Commenter Avatar

      So how effective is Faxon's slim flash suppressor? Have you shot it in the dark?

      December 25, 2021 4:42 pm
    • Commenter Avatar
      Johnathan Smith

      Concerning the hotter burning, higher velocity ammo - you're suffering the one problem that I've had with pencil barrels of multiple lengths... barrel whip. Purchase a rubber barrel resonance device and slide it onto the barrel (it will stretch over the muzzle etc). Start 1/2" or so from the pinned comp and fire 3 shots. Once finished move the rubber resonance device down the barrel by 1/2". Rinse and repeat and you will watch your hot burning ammo go from wild to sub-MOA rather quickly once you find the spot on your barrel that is the center point of the vibrational resonance. You can barely tell the pellet shaped piece of hard rubber is there through your rail, and it can drop the MOA of all ammo you put through that barrel from that point on. I tend to use black epoxy by JB Weld to stick it in place once I find the "sweet spot" just in case my changing out rails, swapping barrels, etc bumps it... it will slide easily out of place.

      January 5, 2021 4:08 am
    • Commenter Avatar

      Same experience I had with Freedom Munitions ammo as far as accuracy is concerned. About 2". I was expecting better for some reason, but really, 2" is pretty dang acceptable.

      December 12, 2018 5:17 pm
    • Commenter Avatar

      My first upper build used a Faxon 16 pencil. Build is lightweight and easily shot 1.25 inch groups at 100 yards in a casual shoot with a 4 power scope with gunshow 55 gr. reloads. As the barrel heated the groups did not wander as I anticipated. Very pleased.

      March 14, 2018 9:31 am
      • Commenter Avatar
        Eric Hung

        Great to hear...much better shooter than me, haha!

        March 15, 2018 10:50 am
    • Commenter Avatar

      Great review Eric. I am planning a build to use at bay style competitions where long shots are limited to 75-100 yards. This looks like it might be the ticket!

      March 6, 2017 9:12 am
      • Commenter Avatar
        Eric Hung

        Awesome, let me know how it goes...once it gets back into stock!

        March 7, 2017 6:26 pm
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