No, not under Federal Law. USC, Title 18 specifies the definition of "firearms" and includes black powder arms under that heading. Idaho law defines a firearm as "any weapon from which a shot, projectile or other object may be discharged by force of combustion, explosive, gas and/or mechanical means, whether operable or inoperable. Idaho law does allow some convicted felons to legally possess firearms, but they must wait at least five years after finishing their sentence and any related probation or parole and then petition the state to have their civil rights restored. Under Idaho law, anyone convicted of any of 36 felonies may not own, use or carry a firearm, which the law defines as "any weapon from which a shot, projectile or other object may be discharged by force of combustion, explosive, gas and/or mechanical means, whether operable or inoperable." That would include a bow. The right can under some circumstances be restored, unless the crime was murder in the first or second degree, or if conviction included the use of a firearm in the commission of any the listed felonies. (For a list of felonies see Idaho Code Title 18, Chapter 3, section 18-310.)