I am thoroughly confused about an element I have come across:
I have never seen a piece quite like this.
It's unlike any Technic connector I've seen, so I doubt if that is what it's for.
The two facing holes on the sides are standard stud diameter, but the tube on the top has angled faces, and doesn't look like any standard Lego width.
I'm starting to wonder if it might be part of some missile launching set, but if not, what kind of piece is it?