WHAT DOES RM66 MEAN?

Is also the revolver six inch model drilled and tapped below rear sight for use that has a pink dot mount adapter It looks like it’s about the same as the S&W 357 magnum revolvers with adjustable rear sightsAssembly of this mechanism was really a problem. The engraved skullcap provides a nod to the RM 052 Tourbillon Skull. The torque-restrictin