E.R. Shaw's Family of Rimfire Replacement Barrels For Ruger 10/.22 Semi-Automatic Rifles • .22 L.R. • .17 HMR • .22 Magnum • .17 Mach II Click here for information, pricing and to order For Ruger 77/.22 and 77/.17 Series of Bolt Action Rifles • .22 L.R. • .17 HMR • .22 Magnum • .17 Mach II Click here for information, pricing and to order