Ruger Threaded Barrel Kit .22 LR 3.50in Ruger LCP II Stainless Steel. 50" Ruger LCP II Stainless Steel - this Ruger Factory Accessory is compatible with your Ruger LCP II pistols chambered in 22 LR. The threaded barrel accepts any 1/2"-28 (Class 2A) muzzle device. This kit contains a factory-manufactured stainless-steel barrel for optimal fit and function. Barrel changing is quick and easy with no gunsmithing required. Barrel cap adapter red recoil spring and 7/16" wrench included. Specifications for Ruger LCP II Threaded Barrel Kit: Manufacturer: Ruger Color: Stainless Steel Fabric/Material: Stainless Steel Threads per Inch: 1/2x28 Caliber: .22 Long Rifle Barrel Material: 17-4 PH Stainless Steel Gun Make: Ruger Gun Model: Ruger LCP II Condition: New Shell Length: 3 1/2 in Package Contents: Ruger LCP II Threaded Barrel Kit Barrel cap Adapter ?ed recoil spring and 7/16" wrench What firearm models does the manufacturer say Ruger LCP II Threaded Barrel Kit is compatible with? The manufacturer says that Ruger LCP II Threaded Barrel Kit is compatible with Ruger LCP IIRuger 90724: Threaded Barrel Kit .22 LR 3.50in Ruger LCP II Stainless Steel