Hammerli Caliber Conversion Kit Features The Hammerli Arms Caliber Conversion Kit lets Force B1 owners switch their pistol over to .22 WMR for low-cost practice and extended range sessions. The kit centers on a 16-inch .22 WMR barrel engineered to drop directly into the existing Force B1 platform without gunsmithing. Because the conversion uses the same host frame and controls the pistol retains its familiar handling characteristics even after the caliber swap. This makes training more accessible since .22 WMR ammunition costs considerably less than the Force B1 s original defensive chambering. Finished in black to match the factory Force B1 the kit includes a Ruger-pattern magazine so shooters have a dedicated feeding source ready to go out of the box. Having a rimfire conversion on hand is a practical way to put more rounds downrange without the cost of larger-caliber ammunition. The kit swaps back and forth with the factory barrel and magazine giving owners flexibility between calibers as needed. For Force B1 owners looking to expand their pistol s capability the Hammerli Arms conversion kit is a straightforward upgrade. Hammerli Caliber Conversion Kit Specifications Manufacturer: Hammerli Type: Caliber Conversion Kit Caliber: .22 Mag Color: Black Barrel Length: 16 Compatible Hosts: Hammerli Force B1 Includes: Ruger-Pattern Magazine 16 .22 WMR Barrel Available At: GrabAGun