I just bought a NIB PT140 Mil Pro from a guy I know who's having financial problems. He bought it last year but had never fired it...in fact, he hadn't cleaned the factory grease out of it. Anyway, I disassembled it today and gave it a good cleaning. After I reassembled it, I noticed something odd - with the striker uncocked, the entire slide assembly seems to be a slightly loose, and can be moved fore and aft perhaps 1/16 of an inch or so. With the striker cocked, it doesn't move. I checked my PT145, and it doesn't do this. I haven't fired the PT140 yet, but I've cycled the slide numerous times and everything seems to be working as it should. Does this sound like something to worry about? Thanks in advance.