It so happens we have a Beretta here...but in 9mm...
If it's for a 96 it should still lock into a 92f if it's beretta. looks like a browning hipower, but it's hard to tell from photos.
It locks into a 9mm Beretta...but not flush.
Does the mag engage slide lock when slide is pulled to the rear???
I have seen a few variants of Beretta 92/96 mags that stick out a bit when inserted and locked in the guns.
It does not engage the slide lock, which leads me to believe it is not a Beretta. We found it in a drawer with a bunch of others. I have identified the others, but this one has no markings whatsoever....