I do agree the fasst changers look kind of dumb stickong out further than the barrel. So you'll need to rebarrel it and THEN get a fasst changer.
The front sites are known for breaking off. Someone probably broke it off or removed and lost it. They're not easy to find replacements (bacci might have some though). If you have a lathe just make a new one. You can also rethread it and use a shotgun bead sight or something.
with photobucket, copy the IMG links and just paste them in.