Iver Johnson Barrel Features The Iver Johnson Barrel brings threaded versatility to the XL frame 1911 platform in 10mm Auto giving shooters a direct path to mounting a compensator or suppressor without sending the gun out for custom machine work. The .578x28 thread pitch is a widely supported standard which means aftermarket muzzle devices are easy to source and install. Six lands and grooves combined with a 1:16 twist rate keep heavier 10mm bullets stabilized through the 6.75 bore supporting tighter groups at distance. Built from 4140 steel the barrel is engineered to handle the pressures that 10mm Auto generates without sacrificing long-term durability. A black oxide finish protects the barrel against corrosion while keeping a low-glare factory-correct appearance that matches the rest of a 1911 s metal finish. The barrel includes a thread cap to protect the muzzle threads when a device is not installed keeping the crown safe during storage or transport. Because it does not include a barrel link or pin installation is intended for shooters or gunsmiths comfortable with 1911 fitting work. This barrel is for sale at GrabAGun for XL frame 1911 10mm owners looking to add threading for suppressor or comp use. Iver Johnson Barrel Specifications Manufacturer: Iver Johnson Model: Barrel Caliber: 10mm Barrel Length: 6.75 Thread Pitch: .578x28 Twist Rate: 1:16 Rifling: 6 Lands and Grooves Material: 4140 Steel Finish: Black Oxide Compatible Hosts: XL Size 1911 Includes: Thread Cap Notes: Does Not Include Link or Pin Some Fitting May Be Required Available At: GrabAGun