Mossberg 500 Home Defense 12 Gauge Shotgun. The company made a slight modification made in 1970, changing the single action-bar setup to a double action-bar. I've been considering taking a Mossberg 500/590 armorer class being offered, but I'm not sure it's worth the almost $300 to become certified on a brand/design I don't really use anymore, or expect to maintain/repair for agency use.
Is it practically any better (see the 'go bang / sledgehammer' post)? Probably not. I too had been scoping out Mossberg 500's and 590's for HD. The Mossberg features a tang-mounted safety that is friendly to both right and left-handed shooters. 5x for an indestructible combat proven gun, vs a gun that won't hold up being dragged through the mountains of Afghanistan, but will work perfectly The Mossberg 500 'Combo-Gun', as it is referred to by several of the big box stores that sell it today, runs right around the $249. 7 (46) Mossberg® Maverick® 88 20 Gauge All-Purpose Pump-Action Shotgun.
It has a standard stock and forend and a simple bead front sight.
First launched in 1960, the 500 series of pump-action shotguns are some of the most popular home defense A Stevens 12 or 20 gauge pump, ones with the pistol grip, ghost sights, and 18.