Lothar Walther Zermatt Arms Rimx .17 HMR Rimfire Barrel 1-9 Twist 18 in Barrel Length RBS-ZER-17HMR-830-1800. 17 HMR Rimfire Barrel: Manufacturer: Lothar Walther Color: Stainless Steel Cartridge: .17 Hornady Magnum Rimfire Barrel Length: 18 in Barrel...