Local shop has one, it has the breacher barrel (would never need) and the 4 plus 1 capacity. What possible advantage does the 4 plus 1 have? (I cant see any advantage) So my question is, why doesnt Mossberg make all of them 7 plus 1? Also, how hard would it be to convert this one to 7 plus 1? I have heard that with the breacher barrel you cant use the extended magazine? Something about clearance?