"Mental institution" means any hospital, institution, clinic, evaluation facility, mental health center, or part thereof, which is used primarily for the care or treatment of persons with mental illness.
"Patient in a mental institution" means the person was admitted, either voluntarily or involuntarily, to a mental institution for mental health treatment, unless the treatment was voluntary and solely for an alcohol abuse disorder and no other secondary substance abuse disorder or mental illness; or
For purposes of this paragraph "explosive bullet" means the projectile portion of an ammunition cartridge which contains or carries an explosive charge which will explode upon contact with the flesh of a human or an animal. "Cartridge" means a tubular metal case having a projectile affixed at the front thereof and a cap or primer at the rear end thereof, with the propellant contained in such tube between the projectile and the cap.
Unlawful possession of firearms, other than handguns, and firearm ammunition is a Class A misdemeanor. Unlawful possession of handguns is a Class 4 felony. The possession of each firearm or firearm ammunition in violation of this Section constitutes a single and separate violation.
720 ILCS 5/24-3.1