The PCZ serial number prefix pretty much nails it down as a non cataloged item from the Performance Center, either as a "one off" proof of concept prototype or part of a pre-production sample run to show to distributors to drum up sales interest.
It certainly has an interesting conglomeration of parts... the oversized mag release and rear sight looks like they fell off a 945-1.
I have a 4006 IDPA model made by the Performance Center with a PCZ prefix. From the information I was able to glean, there were 4 of these that were sent to Lew Horton, mine was one of the four (verified by Lew Horton - Earl Minot).
The 4006 IDPA was to be the "kissing cousin" to the successful 5906 IDPA, except... .40S&W in not a popular round for shooting IDPA and interest was insufficient to warrant production.
I did a factory letter on my gun, other than when it was shipped to Lew Horton, there was not any other significant info.
