So I'm starting my first build for an AR 15 and wouldn't you know it? One of the detents for the take down pin goes flying across the room. Now I've got a better shot of finding Elvis than finding that pin, and with the retarded-ness going on right now I can't even order a freaking replacement pin on line. Anybody have any suggestions for me? I'm sure I'm not the first (or the last) person this has happened to