Faxon Firearms 5.56X45 Nato 16'' 1-8 Pencil Bbl W/Pinned Gas Block Nitride
The Faxon Firearms 5.56 NATO 16" 1-8 pencil barrel with pinned gas block is a complete, ready-to-run barrel assembly for AR-15 builders who want the security of a pinned gas block without the guesswork. This barrel comes pre-drilled and pre-notched at the gas block journal, eliminating the trial-and-error of alignment and giving you real confidence that your gas block will stay put through thousands of rounds. Paired with a low-profile gas block and matching pin, it ships as a cohesive system—no hunting for compatible parts or worrying about whether your setup will hold zero.
Faxon manufactures this barrel in-house from certified 4150 CMV steel, fully stress-relieved and finished in Nitride for consistent performance and durability. The 16-inch profile strikes a practical balance for mid-length gas systems, and the pencil contour keeps weight down while maintaining the accuracy you need on the range or in the field. Every barrel is individually headspace-checked with precision custom-hardened gauges and receives an 11-degree target crown to ensure tight shot groups right out of the box.
The 1-8 twist rate stabilizes a wide range of 5.56 projectiles, from lightweight varmint rounds to heavier match-grade ammunition, making this barrel versatile for different shooting applications. At 1.20 lbs, the 16-inch pencil profile won't bog down your rifle, and the 1/2-28 muzzle thread accepts standard suppressors and brakes. This is Faxon's no-nonsense approach to quality: controlled in-house production, stress relief, air gauging, magnetic particle inspection, and a proven Nitride finish—all the steps that matter, none of the hype.

