Yes they do, I had one and it's not worth a sh*t. Recoil will cause the front stirrup to climb on the frame, a poor mount in the least. If someone wants it, I have it, you pay the postage, you can have it. Lesson learned with me. Much better to jig the frame and drill and tap it for a rail.I believe BSquare (?) makes a no drill scope mount for a k frame. I never had one but I seem to remember seeing one on someone’s revolver at my church’s sportsman group shoot.