Faxon Firearms Pencil 5.56

The Faxon Firearms Pencil barrel represents the pinnacle of lightweight AR-15 barrel design, stripping away every unnecessary ounce while maintaining accuracy standards that rival much heavier profiles. Weighing approximately 0.9 pounds, this barrel takes significant weight off the muzzle end of the rifle, dramatically improving balance and maneuverability without the accuracy penalties traditionally associated with pencil profiles.

Manufactured from certified 4150 Chrome Moly Vanadium steel using button rifling, each barrel undergoes salt bath QPQ nitride treatment inside and out. Unlike surface coatings, this deep-penetrating black nitride process creates a hardened surface layer that resists corrosion and wear while maintaining a smoother bore for easier cleaning and consistent accuracy. Every barrel is air-gauge tested, magnetic particle inspected, and individually headspace verified before leaving the factory.

User reviews consistently praise Faxon pencil barrels for exceeding expectations, with accuracy rivaling barrels costing twice as much. The lightweight profile removes weight from the far end of the rifle, creating better balance that makes the entire system feel lighter than it actually is. While some users report slight overgassing that benefits from an adjustable gas block, the barrels deliver impressive performance across a wide range of ammunition from 55 to 77 grains thanks to the 1:8 twist rate.