Faxon Firearms AR15 5.56 NATO Threaded Barrel 16in Pencil Profile Mid-Length 1-8 Twist 1/2x28 Black. 625in gas block for unmatched reliability. The Faxon 16in 5.56 Pencil Barrel with Pinned Gas Block delivers lightweight handling and rock-solid performance. Each barrel is pre-notched and paired with a pre-drilled low-profile gas block that's pinned and aligned in-house-saving you time and ensuring your gas system never shifts during use. Crafted from 4150 CMV steel and finished inside and out with black nitride this Pencil contour barrel offers excellent corrosion resistance accuracy and balance. Every Faxon barrel is stress relieved air-gauge tested MPI-inspected and headspace verified for dependable performance in every environment. Specifications for Faxon Firearms AR-15 5.56 NATO Gas Block Pencil Profile 16in Mid-Length Threaded Barrels: Manufacturer: Faxon Firearms Color: Black Nitride Finish: Nitride Fabric/Material: 4150 CMV Caliber: 5.56x45mm NATO Barrel Length: 16 in Barrel Profile: Pencil Gas System Length: Mid Length Gas Block Journal Size-Diameter: .625 in Barrel Twist Rate: 1-8 Barrel Material: 4150 Chrome Moly Vanadium Flutes: No Gun Make: AR Platform Gun Model: AR-15 Included Accessories: None Condition: New Gas Block Journal Size-Length: 1.1 in Gun Type: Rifle Firearms Threads Per Inch: 1/2x28 Rifling Profile: Button Rifling Features of Faxon Firearms AR-15 5.56 NATO Gas Block Pencil Profile 16in Mid-Length Threaded Barrels: Factory-pinned .625in gas block: Pre-drilled and aligned for long-term stability under recoil. Lightweight Pencil profile: Improves handling and reduces fatigue without sacrificing accuracy. Mid-length gas system: Smooth consistent cycling and reduced wear on internal parts. Durable nitride finish: Corrosion-resistant inside and out for extended service life. Stringent QC: Stress relieved air-gauge tested MPI-inspected and headspace verified in-house at Faxon Firearms. Package Contents: Faxon Firearms AR-15 5.56 NATO Gas Block Pencil Profile 16in Mid-Length Threaded Barrels What firearm models does the manufacturer say Faxon Firearms AR-15 5.56 NATO Gas Block Pencil Profile 16in Mid-Length Threaded Barrels is compatible with? The manufacturer suggests that Faxon Firearms AR-15 5.56 NATO Gas Block Pencil Profile 16in Mid-Length Threaded Barrels is compatible with AR-15Faxon Firearms 15A58M16NPQ-APGB: 16in Pencil Profile AR15 Barrel 5.56 NATO Mid-Length 4150 QPQ