Jay,

that is exactly what I mean. It is simpler for me to just have another, separate SBR than it is to play "what paperwork does the ATF want for this configuration?" game. Even inside the organization, they can't make up their minds as to what is legal one week to the next.

And while I don't doubt for one second that getting hits is possible at extended ranges with an SBR, I can tell you that if you are shooting anything other than steel or paper, whatever you hit with it won't be overly impressed. Right tool for the right job. 5.56mm out of a short barrel is not the right tool for any serious shooting beyond about 100 yards.