Two theoretical possibilities for the 4-armored-on-glass.
1. You have to fire once. Grab that guy, throw him into the next, grab him, next, grab him, next. This may be possible, but the glass is finicky and the timing is tight.2
2. You have to fire twice. Shot and grab the first guy, throw him such that the glass breaks under another guy. Do that again with the third and fourth. This is less finicky, but still hard. I didn't manage to do it before I accidentally pushed esc and closed the game. It definitely looked possible, though.