16″ Legal, SLIM Perm 3 Port Brake, 14.5″ PENCIL, 5.56 NATO, Mid-Length, 4150 QPQ


10 in stock (can be backordered)

SKU: 15A58M14NPQ-PMB3 Category:


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

We’ve taken them a step further, adding in our patent-pending permanently attached SLIM muzzle devices. Shooters can choose from a 3 port muzzle device or three-prong flash hider, both allowing the full assembly and disassembly of gas blocks and barrel nuts. Shooters are forever free to change their weapon’s configuration without having to go to a gunsmith. 

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.

SLIM Barrel Specifications (Pencil Profile, Permanently Attached):
• 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 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: 19.52 Ounces
• Magnetic Particle Inspected!
• 11-degree Target Crown

*Please note muzzle devices are attached permanently. Any attempt to remove the device will result in the destruction of the barrel and void all warranties.


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