I had a hard time finding the last sniper rifle piece, and i'm sure it was because I picked them up out of order. I know some may think it's not a glitch but if it is not. Then why was the icon half way across the map from where I found it?
The diamond icon only takes you to the general location (it is a hunt for parts after all) I found the Dahl headlands one was the hardest, I must have looked at the actual location loads of times but never saw it until I started jumping around like a freak from frustration :)
I've played through this easily over 10 times and I'm STILL using this topic. Love it. And I always forget about the sniper sight in the mattress pile --- "Damn...if I smoked, I could take a nice, long drag right about now and look kinda cool"