I received an answer to my two Guardian frame differences from Keith Lawton of Dan Wesson. According to him, the Guardian frame has been changed. Apparently I have one of the old style and one of the newer configuration. It looks like all of Zoid's and Dwe guardians are of the older design as well and that is why the EB MSHs fit. I would suggest you know which one you have or buy if you are thinking of using EB replacement parts that you may have been lead to believe would fit. I'll just add this note. For those of you who thought I didn't know my A$$ from a hole in the ground when trying to tell me there wasn't a difference in my two guns. Your apology is accepted.