Ruger model Single Six revolvers are equally at home on the target range, trail or campsite and offer the following features, a wide variety of model Single Six revolvers are available, including blued and stainless steel models, .22 LR / .22 mag. and .17 HMR / .17 Mach 2. Some convertible models include two cylinders, patented Ruger transfer bar mechanism and loading gate interlock provide an unparalleled measure of security against accidental discharge, adjustable and fixed sight versions available.