IF I was again (unlikely given my age) an advisor to a foreign military/police force in Latin America, I would pick "Stainless Marine" shotguns. = The biggest problem that we had with any of the pump-guns was RUST, as the "rainy season" is LONG & it rains every afternoon there for 6+ months.
Btw, we had a FEW Winchester 1200 pumps in the inventory & those were "not liked" by our "range guys".
Otoh, the 50+ YO Winchester Model 12 riot-guns (with the metal HG & bayonet lug) WERE WELL-LIKED by all who got one.
Btw, IF you were going to buy a shotgun for a 60" tall, 92# female & who wears a size 1-2 dress, which shotgun would you pick for her?? = My 12 gauge shotguns are "too much gun" for her.
("A certain XYL" has informed me that, "I'm NOT staying home, twiddling my thumbs, while you go hunting.".)
SW - I agree with Sam; 20 bore is the way to go (male or female). With buckshot (#4 or larger) it is absolutely devastating out to 20m. Most 20 bores are sized for the cartridge so with heavy loads felt recoil ends up being pretty dimilar to a 12ga. If she can physically handle a 12ga, you might find more options for reduced loads which can bring recoil down below that of a 20ga even.
I did manage to find at least one maker of reduced recoil 20ga buckshot.
I fired 30 more fiocchi low recoil 00 buck and 10 sellier and bellot full power 00 buck. It fired all 40 rounds with no malfunctions. Although I did spray some lps 2 heavy duty lubricant into the action and worked it in good prior to firing any rounds. I don't know if that had anything to do with it or not. I guess it's possible.
Although, the ejection seemed very weak and it looked like it was barely kicking them out of the action.