uh. Yah, go to
www.cmgsccc.com. Go to CB code section. go to PSO. Look at the item modifier digits. All the weapons with capitalized letters are "rares". But there are no such things as rares in PSO anymore. If you want to know if a weapons duped or not, heres how:
If you go in a game, and some guy says "here are some free items, i duped alot of them to give to people". Hell, if a guy gives you a free rare, then it's duped. If YOU find the items offline, or online right after killing a monster, then it isn't duped. But what does it mattter if it's duped or not?
www.mamak-int.com might have a rare item list.