In Lethal Heritage, Phelan encounters a Mad Cat that engages him with two large lasers and four medium lasers. This information is repeated to Myndo Waterly by Anastasius Focht in the next chapter (admist... slightly less realistic theories, admittedly).
The problem I've stumbled across is that this matches no known Mad Cat configuration. In fact, no Mad Cat configuration has four of any kind of medium laser, let alone four that are all ER versions. Initially I attributed it to the ER small laser that existed on the Mad Cat Prime at the time of Lethal Heritage's publication, but seeing as that hasn't existed for nearly 20 years it leaves a little bit of a quandary.
I realize the possibility exists for a custom configuration, but I figured I'd put in a question to see whether it's supposed to be a Mad Cat Prime before automatically assuming as much, and it would be fairly odd for no such configuration to be codified in ComStar records if it was the very first Clan 'Mech ComStar ever laid eyes on.