Ruger model Single-Six Revolvers are the perfect small bore single-action revolver for plinking, small game hunting or serious competition. The patented transfer bar mechanism and loading gate interlock provide an unparalleled measure of security against accidental discharge and the cold hammer-forged barrel results in ultra-precise rifling that provides exceptional accuracy, longevity and easy cleaning. It comes with an extra cylinder that allows shooters to quickly change from shooting .22LR to .22WMR. Features22 WMR Conversion CylinderAdjustable Rear Sight (Windage and Elevation)Integral Scope Mounts (Scope Rings Included)