Iver Johnson Barrel Features The Iver Johnson Barrel is machined from 4140 steel a chrome molybdenum alloy valued in firearm barrel production for its strength and resistance to wear under repeated firing. The barrel features 6 land and groove rifling with a 1 in 16 inch twist rate a traditional rifling specification that has proven reliable for standard .45 ACP ammunition in the 1911 platform for decades. At 5 inches the barrel is sized specifically for government size 1911 frames giving owners a correct length replacement rather than a shortened or lengthened substitute. A deluxe semi gloss blued finish gives the barrel a traditional black appearance that blends with most factory 1911 finishes. This barrel is designed to fit first generation 1911 pistols and buyers should confirm their specific pistol generation before ordering to ensure proper fit. Some fitting may be required during installation which is typical for aftermarket 1911 barrels given the tight tolerances the platform depends on for reliable function. The barrel does not include the link or pin so owners should plan to reuse their existing hardware or source those parts separately. The Iver Johnson Barrel is available for sale at GrabAGun for 1911 owners looking to replace a worn or damaged barrel with a quality 4140 steel replacement. Iver Johnson Barrel Specifications Manufacturer: Iver Johnson Model: Barrel Compatible Hosts: 1911 Government Gen 1 Pistols Only Caliber: .45 ACP Length: 5 Material: 4140 Steel Finish: Black Twist Rate: 1:16 Rifling: 6 Land and Groove Threaded: No Barrel Length: 5 Available At: GrabAGun