But do you by any chance know which one was in use when this issue happen?..

if so, leave it at home, and try another.. Even though they are new, good named Mags, ya never know? maybe a lemon made it out of the factory?

And how bad the shell is bent, I'm trying to figure out how a BCG could cause that, by its self?
even if it had excess drag, I cant see it doing that?..

Anyway, a Short time back, I had a shell jam really bad my self, I thought for sure I was gonna break the charging handle trying to jerk it back.. in my case it turned out to be an old GI mag I was trying out, but again, whats to say a newer, good brand, well known to be dependable mag, did not in fact, act up?..

Ammo? or Mag issue?