OK, for 1- if u spend the tax on it, and have no prior felonies u can get it, including a M134a if u have the 100K+$$$
2- class 3 license is for dealers, but, they dont have to pay the tax stamp either, and, they have to go to regular screenings, and classes, and many paper tests involved...
3- any more Q's email me at
PDACustomArms@gmail.com i happen to do a lot of work on weapons of all sorts, from "hid-a-nife"s to custom assault rifle stocks
4- the "legal" P90 is available in 5.7 or 223 both having long barrels, if u got a long barrel one, and shortened it, it would then be a C3 wep, and, u legally would have to notify the ATF...*spit*, sorta like the HK MP22, which is an MP5/40a2 in .22 with a permattached fake suppressor, u take that off and, technically illegal, i cut mine off though i dont have many full length guns, the shorter the better for me, but, then, i hunt squirrels and doves with 12GA 00, which is 3 1/2 with 8 to 9 pellets
Peace.