ELD Performance 18 6MM ARC, Mid Gas, Medium Profile, 1:7.5T, .750 Gas Journal, 5/8x24, 4150 CrMoV, Nitride Finish, Type 2 Chamber

This barrel is 18-inches long and chambered for 6MM ARC. This rifle length barrel has a 1:7.5 twist rate and is crafted from 4150 CMV with a black nitride finish. It has a medium profile and operates on a mid length gas system

Davidson Defense 'Imperial Decree' 18 AR-15 6mm ARC Nitride Rifle

OTD AR-15 6MM ARC Lightshow II - Gold Upper Build Kit

MMC Armory - Firearm Barrels

OTD AR-15 6MM ARC Lightshow II - Gold Upper Build Kit

DD AR-15 6MM ARC Lightshow II - Gold Upper Build Kit

Barrels

ELD Performance 18 6MM ARC, Mid Gas, Medium Profile, 1:7.5T, .750

ELD Performance 18 6MM ARC, Rifle Gas, Medium Profile, 1:7.5T, Nitride Barrel - $109.99

Davidson Defense 'Imperial Decree' 18 AR-15 6mm ARC Nitride Rifle Complete Upper Build