From the Manufacturer's site:
Faxon's MATCH SERIES of barrels takes our renowned performance and value up a notch.
Manufactured 100% in-house from gun-barrel-quality bar-stock, the Match Series starts with 416-R in 5R rifling. 5R is a hybrid rifling, with lands opposite grooves and reduced sharp angles that reduces jacket deformation increasing velocity and easy cleaning. We chamber our Match Series in .223 Wylde, a hybrid chamber that the 5R rifling takes full advantage of. Better accuracy through less bullet jump, but fully and individually MPI tested for your safety. After rigorous testing, the barrels are Nitride treated inside and out, locking in the bore, improving barrel life, and keeping the elements at bay.
The extension is coated in NP3, a nickel-teflon coating that maintains incredible dry lubricity, corrosion resistance, and with the coating, tightens up fit between the extension and receiver - again improving upon accuracy. Combined, the Match Series of barrels are ready for when duty calls or the buzzer beeps with unrivaled performance value.
Barrel Material: 416-R Stainless
Barrel Type: 5R Button Rifled
Barrel Caliber: .223 Wylde
Barrel Twist: 1:8
Barrel Length: 16"
Barrel Profile: Heavy Fluted
Barrel Gas System: Mid Length
Inside Finish: QPQ Black Nitride
Outside Finish: QPQ Black Nitride
Muzzle Thread: 1/2-28 TPI (Threads Per Inch)
Gas Block Diameter: .750"
Gas Block Journal Length: 1.1"
Gas Port Diameter: .081"
Barrel Extension: M4 - NP3 Nickel Teflon Coated
Barrel Weight: 1.71 Lbs
Magnetic Particle Inspected!
11-degree Target Crown
Faxon Firearms barrels are the pinnacle of value. Manufactured 100% in-house from cradle-to-grave, these barrels are fully stress relieved, air-gauge tested, and 11 degree target crowned to ensure superior accuracy.
Quality is imbued into our barrels from the start. We start with the best materials, either certified 4150 Mil-Spec steel or 416-R Stainless. From there, each barrel goes through a battery of tests at each operation until finished in Nitride and final inspected. All barrels are individually checked for headspace by precision custom hardened gauges.