I'd be interested in knowing that information as well.
I check MK II listings on Gunbroker regularly, and they don't seem to be especially scarce.
I've owned this one made in 1984 for some time now.
By popular demand, here is a sticky with info for subscribing to RENE.
What is RENE? The Red Eagle News Exchange (RENE) is a quarterly Ruger collector & enthusiast's newletter with the latest information on Ruger firearms, member articles, new Ruger variations & discoveries, selected recent auction results, classified ads & announcements, etc. New members also get a complimentary copy of the Reference of Ruger Firearms, which has a HUGE amount of detail on models, variations, production numbers, timelines, etc. Updates to the Reference are made every few years and...
The only real problem with the early KMK series pistols is the 2 piece tapered ear bolt.
Sometimes the ears will separate from the bolt. It happened to my friend Leon with his KMK4 but he had the ears welded back on. Leon was a tool and die maker so it was no big deal for him to repair the issue. When he finished you would have to look hard to see that he had fixed it
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