I don't have any pics as this happened about 1978. I had an ag42B fire out of battery.
The rifle was in excellent condition, cleaned and lubed properly. When I checked it out after the smoke cleared and I got back up, the mag and other 9 rounds was blown out against my right thigh, leaveing a bruise all the way from Peter to my knee, it turned out the firing pin, was out to far.
In those days, the rifles came with a spare mag, sling and parts kits, which also included a firing pin depth guage. It was way over max.
The rifle wasn't destroyed but the stock was shattered and the extractor, plunger/spring and the magazine, were either gone or destroyed.
Other than a surprised look on my face and a bruised thigh, I was OK.
I went to Lever Arms and found a stock and another new in wrap mag. I wanted to keep the unit complete as bought. Put it back together and all was well, once the firing pin extrusion was set properly.