Pointing and aiming a firearm in Wisconsin is a misdeameanor, ESBUOADW, Endangering Safety By Use Of A Dangerous Weapon. That same statute covers Possession of a firearm intoxicated, also a misdeameanor.
See 941.20
To charge a felon in possession of a firearm, you need the firearm, in either state or federal court.
In federal court you have to prove the firearm or ammunition traveled across state lines, that is the Interstate commerce nexus.
Got any court cases and legal precedence to back this up.