Planing of Barrett M468 part fixes, upgrades and M16 upper receiver After coming back from National Service, I realized that Ive stopped to continue to build my cardboard M468 more than 3-4 months. Beside, I also noticed some of mistakes on the gun. Here are the list of parts which I not satisfied. List of Phailed Parts Lower Receiver The real dude. Magazine well too narrow Pistol grip Trigger too small Fake bolt catch button Bad Scaling The Fake n Gay The upper receiver looks good and has no problem. I will remake the lower receiver soon . Once the lower receiver is completed, M16 upper receiver will be the next. Stay tuned for update.