From a reliabilty standpoint certainly. The drawback is the gun isn't really designed with that purpose in mind. (Just for starters the barrel is too long to be nimble enough in an indoor setting with close quarters.)
Heck, the Spartan even without a shell in the chamber is a pretty good club. It certainly feels substantial enough to do some real damage. As far as the shortening the barrel to 20", a metal cutting bandsaw could wack off 8" in no time. Of course it may not work so well for sporting clays, but it could do plenty of damage in a small room.
i would bet my life on a short barrelled shotgun if it was a pump any day of the week, most of the time the sight of one and hearing the action being worked is enough. i must be foolish but i bet my life on a mechanical m16 for 18 months in vietnam as many others have done and are doin gtoday.
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