I heard today that it was unlawful for a 17yo to possess the weapon he had. If that's the case, I believe he's fighting an uphill battle and put himself in a bad situation that he shouldn't have been in.
Only a pistol in Wi.You have to be 21 to buy one.Of course that does not mean you cannot have one.There are no "Assault Weapons"outlawed in Wi.Thanks to Gov.Scott Walker.