If you have a Colt LE6933 that's seen better days, or you'd like a genuine Colt OEM barrel that matches the profile of that found on Colt's LE6933, then you're in luck! Colt now offers its factory-made barrels as standalone items, so you can refresh your rifle or complete that next build with ease! Each Colt LE6933 AR-15 Barrel, chambered in 5.56 NATO, features six-groove rifling with a 1:7-inch rate of twist. The barrels include M4-style feed ramps and have a chrome lining that prevents corrosion. Each barrel is set up for a carbine-length gas system and features 1/2""-28 TPI threading at the muzzle. Colt's LE6933 AR-15 Barrels are available in 11. Mfg: Colt