I've got a 1969 Weihrauch HW 30 MK II that I'm currently using with a small 2.5x20 scope mounted in Sportsmatch 13MM medium rings. Although of good quality and more than adequate for the job, I'd like to locate some 13mm rings with a lower height than the Sportsmatch I'm currently using which are listed as being .590 to the underside of the ring. These are currently the lowest available 13mm rings that are offered from Sportsmatch. Any replies would be helpful. Thank you