I received my "used" Scar 17 today. FDE, Acog TA31ECOS-G, FN front rail extension & Sig vertical rip with light & laser. I don't think the thing has ever been shot. Everything looks brand new including the magazine. I think I'm going to love this thing! My phone crapped out after two pictures so this is it so far. I'm struggling with how to format posts on this site - I'm new here. I can't get the lines to advance with the enter key? ETA - this gun came without a rear iron sight. Any reason a Troy folding sight from an AR wouldn't work?