Breach stuck open on loaded mag

[Logger08]

Originally Posted by mrerick

Remove the upper receiver, insert each magazine and look as how high it pushes the hold open and extends up above the frame.

Look at the shapes of the feed lips, and see if one has had them bent up and open.

What does the breech block hang up on? is it the rear of the magazine?

OK, I will check and come back with the results.
But this will take a few day, as I have currently no access to the old lady.
Best regards,
Martin