Went to change out the scope on the CZ 204 Ruger and it has to use Warne mounts. The rear mount has a stud in it to a line with and stabilize the mount but the rings/mount are one piece with the screws on top of the mounts instead on the side. You have to put the rings around the scope and connect the top screws then work the mount onto the base. It is like working backwards. You can not tighten the mount until everything is hopefully alined.