Chambered in 5.56 NATO with a 1:8 twist

4150 chrome moly vanadium steel

Mid-length gas system

Pencil profile

1/2x28 thread pitch

QPQ nitride finish

Button rifled

Gas seat diameter: 0.625"

Gas port diameter: .078"

Gas block journal length: 1.1"

M4 barrel extension

Magnetic particle inspected

11-degree target crown

Weight: 1.20 lbs

Faxon Machining engineers and manufactures components that are found everywhere. In theaters of combat, on the ocean floor, in cars, in aircraft, on the ISS, and on Mars. Now, they bring their engineering excellence to bear on providing new and innovative components for the AR-15 platform that set the standard for quality. Faxon Firearms, manufacturing strategic solutions for tactical problems.Manufacturing of Faxon barrels begins and ends in their Cincinnati, Ohio facility under ISO 9001/9100 quality certifications. Each barrel they produce is fully stress relieved, air-gauge tested, and 11-degree target crowned to ensure superior accuracy.Crafted from the best materials, either certified 4150 MIL-SPEC steel or 416R stainless, each barrel undergoes rigorous quality controls before QPQ finishing and final inspection. Once finished, barrels are examined for proper headspace using precision custom hardened gauges.