As per the Manufacturer's site:
Just what is the Gunner profile?
The Gunner profile is a blend of two of the best performing profiles of all time, Gov't and Pencil.
Proving that every once and awhile, the Government can do something right, the Gunner's profile from the extension to the gas block mimics that well-known taper. From there, innovation takes over and the Gunner moves to a .625" gas block journal and our famed pencil profile out front.
Removing the weight from the front of the barrel ensures maximum versatility and keeps material to the rear to maximize heat resistance and mitigate whip.
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 Steel GBQ
Barrel Type: 5R Button Rifled
Barrel Caliber: .223 Wylde
Barrel Twist: 1:8
Barrel Length: 16”
Barrel Profile: GUNNER
Barrel Gas System: Mid
Inside Finish: QPQ Nitride
Outside Finish: QPQ Nitride
Muzzle Thread: 1/2-28 TPI (Threads Per Inch)
Gas Block Diameter: .625"
Gas Port Diameter: .081"
Gas Block Journal Length: 1.9"
Barrel Extension: M4 - NP3 Nickel Teflon Coated
Weight: 1.33 lbs
Magnetic Particle Inspected!
11-degree Target Crown