I think i remember reading about that and finding that when i looked up the serial number it was part of the last batch after that was fixed but i honestly could be making that up. All i know regarding if its free floating is that when the slide is removed and the hammer is back and i push on the firing pin from where the hammer would strike it has a full range of movement and penetrates out the little hole where it would stike. Shouldnt it lock up or something? Sorry if im lacking in certain terminology or part names.
There is a reason the first and second amendment are the first and second, they are necessary to protect the rest.