Here:
Box inside the gun has been modified:
Box outside is a brand new drop-in from WE. It is labelled as "closed bolt" but the auto-sear drags on the bolt. You could see on the bolt that there are two section that are worn, the middle where the hammer interfaces and the side where the auto-sear is not supposed to touch but does.
The angled tip has to go on the "new" trigger box.