Does anyone out there have shots of the inside of a KS-15(4) showing the added weather seals, etc. as compared to an M2 or M2-R (haven't been able to find any on the web)? I have a body that falls in the right serial number range & has the M4-style loading, but don't know whether it's an actual KS-15(4) or just a retrofitted M2. I suppose it's also possible that someone removed the extra weather seals.
Thanks in advance, Chris