Yeah, our Sheriff's Office uses the Mossberg shotguns. They're also a little cheaper than the 870s.
I've never been a fan of the shotgun, but in Nam I carried one that had been given me by my former CO...it was a sawed-off Ithica, trimmed on both ends. It was lighter than a .45 (or so I remember) and I carried it strapped to my pack as a secondary weapon.
