I have several HK G3 type rifles as well as a couple of HK 93's. This mount will not fit on any of them. The legs of the mount flex outward as the mounting screws are tightened, so there is no way that the mount will hold tight to the mounting lugs on the receiver. As I tightened the screws, the leg on one side of the receiver would always slip off and scratch the paint. The "elevation" screw also gouges the receiver. I followed the directions to the letter, but no luck. This is NOT a good, solid design such as you will find with the B&T or MFI mounts.
This review was written in the old system and had content requirements that are different than reviews written today.