The ATF now allows importation of shotguns with forward pistol grips and integrated rail systems... Three-gun is officially not a sport. The whole "sporting purpose" test is BS, but this is a step in the right direction.
http://www.atf.gov/firearms/industry/july-2012-importability-of-certain-shotguns.pdf
http://www.atf.gov/firearms/industry/july-2012-importability-of-certain-shotguns.pdf