Ithaca M37 Police Special 12 gauge, 3 inch capable with extended magazine.
-manual pump action, not much to fail here and not ammo sensitive, if it chambers, it can be fired
-designed back when quality assurance meant this shotgun, can be used in wartime OR peacetime tasks with only cosmetic changes
-non-restricted, like it or not easier to move about
-easy to acquire ammo for
-can be purchased for a good price in the used market
-iron sights for slug shooting
-.73 calibre makes a big hole in stuff, like infantry musket missions of the past: "kill a horse, and stop a cavalry charge"
-'rotoforged' trademark choke for shot
-parkerized finish, easy to care for
-rugged all steel design
-ergonomic, lefty or righty
-shotguns have better chances in poor light, to hit intended target within range
-shotguns can be used on land mammals or flying things
-7 rds +1, pretty good firepower, and quick about it!
-no loose magazines to drop/damage/lose
-one wooden plug and your hunting game birds
-multitude of ammo capability,birdshot,buckshot,slugs, and various less-lethal rounds
-light weight as far as shotguns are
-time proven design, used by USN SEALS, NYPD, LAPD, and fulfilled duties okay in green jungles and concrete jungles.