The Ruger SP101 revolver is a double-action firearm which embodies many features found in the famous Ruger GP100 and Ruger Super Redhawk revolvers. The unique frame extension permits the use of full wraparound style grips of any desired configuration. This feature reduces overall weight and contributes to a desirable muzzle heaviness that helps to control recoil. The crane and cylinder assembly of the SP101 revolver lock directly into the frame, both at the rear of the cylinder and at the front of the crane. The ejector serves only as an ejector - it does not rotate with the cylinder. All of this mechanism is readily removable without tools and dismantles, along with the cylinder/crane group, into a small number of subassemblies for inspection and cleaning. The internal parts are installed either through the top or bottom of the gripframe; therefore, no side plate is needed. The resulting double solid frame contributes greatly to the extraordinary strength and reliability of t...