The Faxon Duty Series 10.5″ Pencil Profile 5.56 NATO barrel delivers a lightweight, low-drag option for compact carbines without sacrificing durability or accuracy. Built from certified 4150 CMV, button-rifled with a 1:8 twist, and finished inside and out with black nitride, this 10.5″ pencil-profile barrel is optimized for shooters who want compact handling and efficient performance. The lightweight pencil profile features lower overall weight (approx. 0.9 lb) for maneuverability and balance in compact carbines and AR pistols.
The carbine gas system ensures 10.5″ length tuned to carbine gas for better dwell and more consistent cycling than pistol-length barrels. Precision & durability are guaranteed through full stress relieving, air-gauge testing, magnetic particle inspection, and finishing with an 11° target crown. The clean, corrosion-resistant black nitride finish is applied inside and out for extended service life and easier maintenance.
The pencil contour reduces mass at the front of the rifle for quicker transitions and better balance, making it a top choice for shooters who prioritize handling without compromising the structural integrity expected from a duty-series component. Standard M4 barrel extension provides compatibility with AR-15 bolts and uppers; uses a low-profile .625″ gas block on the 1.1″ journal for a flush, lightweight setup; and features 1/2-28 muzzle threads that accept brakes, compensators, and direct-thread suppressor adapters.
