User claims it fell out of his bag on to carpeted floor. Rob Anderson of US Palm replies in the thread.
Gabe Suarez over at Warrior Talk says he did drop test on concrete to where Combloc metal lips were bent (the only bad AK mag I've ever had was a bent lip 40 rounder). Photographic evidence to follow at One Source Tactical.
My popcorn is out, I'll do a drop test of my own on my carpeted floor.
EDIT: Here's the video replies: