Buy the Survivor Model and replace the goofy buttstock with a standard stock from NEF or Choate.
The standard .410 shotguns will chamber a .45 Colt round and the tight constriction of the full choke will almose guarantee that you will rupture the muzzle trying to shoot a solid bullet through it. Not good.
The Survivor, and all, convertable guns allow for open choking when solid bullet .45 Colt rounds are used.
Fair warning, none of them are very accurate.