Good practical advice above. And I do rather like the M4 - which is how I fell into this topic in the first place!
My local law enforcement is excellent and I'm honored shoot with some of Arizona's finest at our local ranges. But while I value their professional opinons on the subject, enforcement of 922r alone is not part their normal duties, unless, as you point out above, it is comes up during another investigation.
So..... since the Benelli is such a outstanding weapon for home defense, I think its important that it stand up to the most intense scruntiny in the event it has to be used as the final option to defend home and family. Then, even the most "level guy" is going to have to answer lots of questions, especially about a weapon that makes such big holes. Hence my thread of technical questions above....