In the late 90's, legislation was passed regarding domestic violence and the possession of firearms. Specifically, the Lottenburg Amendment and the Brady bill. These make it unlawful to own ANY firearm after being convicted of ANYTHING, domestic violence related. It also applies to ANY TYPE of restraining order, civil or criminal, as a result of domestic violence. In the case of the R/O, if there is no conviction of a domestic violence/crime, after a certain amount of time, the court can be petitioned to have your second amendment rights reinstated.