Oh, I recognize some of these. the one on the top right is the KSG-12, the bottom row on the middle is the SPAS-12, on the bottom row, second to right is the AA-12, and the one next to it is I think a Remington 870. And the top row, third from left is the semi-auto Benelli M4? Correct me if I'm wrong.

Dude I think that's the select-fire variant Benelli M3 but we could both be wrong

I mostly recognize all or most of them, plus I get that "anti-aircraft gun" reference. Can't remember the name of the movie, though, but I remember it was the short-barrel entry gun version of the SPAS-12 in that movie. The lever-action "Mare's Leg Deluxe" could be a Wiinchester 1887 or 1901 (12- or 10-gauge). Definitely recognize the USAS-12, AA-12, Serbu Super Shorty, KSG, Pancor Jackhammer, and Saiga 12. Might also be a Vepr 12 in there.

Does it irk you how the stock on the SPAS-12 and the forearm on the Super Shorty are always left in their storage/folded position in movies? So insulting!