In Wisconsin, a person who is the subject of a domestic violence
restraining order loses his state gun
rights. A person who has a misdemeanor
conviction on a crime of domestic violence loses his Federal gun rights. 18 U.S.C. § 922(g)(9)
If your restraining order has been lifted and your conviction has been set aside, pardoned or expunged or your civil rights, including your gun rights restored by Wisconsin, the Federal government will lift its restrictions and you will regain your second amendment rights.
If the restraining order is lifted, it possible that you have your Federal gun rights because the Federal government defines "crime of domestic violence" as one which "has, as an element, the use or attempted use of physical force, or the threatened use of a deadly weapon, committed by a current or former spouse, parent, or guardian of the victim, by a person with whom the victim shares a child in common, by a person who is cohabiting with or has cohabited with the victim as a spouse, parent or guardian, or by a person similarly situated to a spouse, parent, or guardian of the victim." If your case and situation does not fit into that definition, your state and federal rights would resume at the expiration of the protective order.
If you can't clear a Federal check to get a gun however, then you would have to look to an expungement
or a pardon or hire a lawyer to petition the court for the full restoration of your gun rights.