FIREARMS B Possession of Firearm or Ammunition by Convicted Felon is a charge in most states that prohibits felons from possessing a firearm or ammunition as defined by state law. The charge applies to those individuals who have been convicted of felonies in the past; it does not apply to those who have been convicted of misdemeanors. Types of FIREARMS B Possession of Firearm or Ammunition by Convicted Felon may include handguns, rifles, shotguns, and other firearms as defined by state law. The charge may also include ammunition such as bullets, shells, and magazines. Possession of Firearm or Ammunition by Convicted Felon is a serious offense and can carry serious penalties.