Glad it helps. A lot of the information from back then runs together or splits off in two different directions based on who you talk to. What I wrote is basically the information for that particular gun as best I can decipher it from sitting down with both Tim and Earon.
Post some pictures of the other Annihilator/Marauder and I will let you know anything else I notice.
There is a little more information about the different model Annihilators and Marauders here: Jay "The Old Buzzard" Jackson and 1st gen Annihilators/Marauders / Old News