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The Faxon Duty Series 16" Pencil Profile barrel is what you reach for when you want an AR-15 that carries light and points fast. At right around 1.2 pounds, this is one of the slimmest contours Faxon makes, and it pulls weight off the front end of your rifle where you feel it most. That translates to quicker target transitions and a lot less fatigue after a long day at the range or in the field. It's chambered in 5.56 NATO, so it happily runs both 5.56 and .223 Rem, and the 1:8 twist does a great job stabilizing everything from lighter 55 grain plinking loads up through heavier 77 grain match ammo.
The mid-length gas system is a big part of why this barrel shoots so smoothly. Compared to a carbine-length setup, mid-length lowers pressure at the bolt carrier, which gives you a softer, more linear recoil impulse and easier cycling. Pair it with an adjustable gas block and it gets even sweeter, especially if you're running a can. The muzzle is threaded 1/2-28 for standard AR-15 flash hiders, brakes, and suppressor mounts, and it uses a standard M4 barrel extension so it drops into any mil-spec upper.
Faxon machines these in-house in Ohio from 4150 CMV steel, then finishes them in black nitride inside and out for solid corrosion resistance and easy cleanup. Every barrel is button-rifled, stress relieved, air-gauge tested, magnetic particle inspected, and headspace checked before it ships. The 11-degree target crown protects the rifling and helps keep groups consistent. It's the same recipe that's made Faxon pencils a favorite for lightweight builds, and builders who've run them on WWSD and patrol-style rifles consistently praise the fit, finish, and how well the weight centers on the gun.
If you're chasing a trim, agile carbine that still prints tight groups with the right ammo, this is a hard barrel to beat.
The 1:8 twist is a versatile choice that handles a wide spread of 5.56 and .223 loads. It stabilizes lighter 55 grain ammo for practice and range time as well as heavier 69 to 77 grain match bullets. That flexibility is a big reason the 1:8 twist is so popular for general-purpose builds.
No, this barrel ships on its own without a gas block or gas tube. It uses a standard .625" gas block journal and a mid-length gas tube, both of which are widely available. Faxon also sells a matching low-profile gas block and mid-length gas tube if you want components designed to work together.
Yes. It uses a standard M4 barrel extension and drops into any mil-spec AR-15 upper receiver. The 1/2-28 muzzle threads accept common flash hiders, muzzle brakes, and suppressor mounts.
It is, and it's earned a strong reputation for punching above its weight class. Builders report tight groups when paired with quality ammo, and pencil profiles have been used in plenty of well-known lightweight rifle builds. Keep in mind any slim barrel heats up faster than a heavy contour during rapid fire, so it shines in more deliberate shooting.
| UPC | 816341020146 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 15A58M16NPQ |
| Barrel Length | 16" |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Color | Black |
| Length | 16" |
| Model | |
| Product Type | Barrel |
| Sights | No |
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