Here's Tman holding the mag to show the back side damage.

Here I am getting ready to shoot it with a 7.62 X 39 AK.

I hit near the bottom of the mag and blew it off.

Nasty hole behind the mag.

Sure didn't slow down the round.

Notice how the back of the mag has split from the rounds inside cooking off.

I tried another shot nearer the top, and it made this exit.