Actually there were not many Melonite 4566s made. Compared to other models. While some are rare, others - depending on whether the production numbers are accurate - are at least scarce.
There were possibly 25 made of the KJF serial prefix Melonite 4566s with forward slide serrations. It is said that these were LE Salesmans samples, made to guage the interest of Police Agencies.
The WVSP Melonite 4566TSW order was less than 800 guns. Those were thelast known Melonite 4566s made.
As to the pistol in question, the RJF prefix Melonite 4566, there were - according to one "factory letter" that gives a number - 119 made. I have seen the number of these made also quoted as high as 622, in an auction ad that claimed to have a factory letter stating same. And another reference on the net stating 325 of these made. With no mention of how that number was determined. What IS known, to date, is that the Melonite RJF prefix 4566s observed to date, all fall between a low serial number of 3106 and a high of 3184. None higher or lower has been found. Yet
Additionally, there were 10 Melonite 4566s made by the Performance Center, for a private special order. These guns featured Briley bushings, match grade barrels and forward slide serrations. The serial prefixes were the owners initials.
And the last known Melonite 4566 was also made by the Performance Center. It was also equipped with a match grade barrel and Briley bushing and forward slide serrations. It had the TSW tacked on rail and an adjustable target rear it. It was used in an article featured in Combat Handguns by Wiley Clapp. In the article, it states that the Performance Center made this one of one pistol to guage the interest of Law Enforcement and the gun buying public, in a short run of these pistols. Evidently, not enough interest was shown and as far as is known, that one example was the only one made. Its fate is unknown.
AFAIK that is every Melonite 4566 known to have been made. Around 940 total, give or take. Nice guns, tht there should have been more of. Regards 18DAI