FM Products Mike-9 Ultralight AR-15 9mm Luger Threaded Rifle Barrel 5 inch 1-10 Twist 1/2x28 Salt Bath Nitride Black. FM-9 9mm Barrels are built to work with all Colt and Glock style 9mm uppers and come with integrated feed ramps to keep your pistol-caliber AR chambering and extracting rounds smoothly. Foxtrot Mike finishes each FM-9 9mm barrel with a long-duration deep-penetrating salt bath Nitride QPQ/Melonite finish for superb resistance to wear and corrosion. You can put a lot of rounds downrange because these barrels are built to last. Specifications for FM Products Mike-9 Ultralight AR-15 9mm Luger Threaded Rifle Barrel: Manufacturer: FM Products Color: Black Finish: Salt Bath Nitride Caliber: 9mm Luger Barrel Profile: Ultralight Threads per Inch: 1/2x28 Barrel Twist Rate: 1-10 Barrel Material: 41V50 Chrome-Moly Vanadium Steel Barrel Shank Diameter: 1 in Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Gas System Type: Blowback Package Contents: FM Products Mike-9 Ultralight AR-15 9mm Luger Threaded Rifle Barrel What firearm models does the manufacturer say FM Products Mike-9 Ultralight AR-15 9mm Luger Threaded Rifle Barrel is compatible with? The manufacturer suggests that FM Products Mike-9 Ultralight AR-15 9mm Luger Threaded Rifle Barrel is compatible with AR-15FM Products MIKE-9-5.0BRL-UL: Mike-9 Ultralight AR-15 9mm Luger Threaded Rifle Barrel 5 inch 1-10 Twist 1/2x28 Salt Bath Nitride Black