"Civil disorder." Any public disturbance involving acts of violence by assemblages of three or more persons, which causes an immediate danger of or results in damage or injury to the property or person of any other individual.
"Explosive or incendiary device." Includes:
"Firearm." Any weapon which is designed to or may readily be converted to expel any projectile by the action of an explosive; or the frame or receiver of any such weapon.
"Law enforcement officer." Any officer or employee of the United States, any state, any political subdivision of a state or the District of Columbia and such term shall specifically include, but shall not be limited to, members of the National Guard, as defined in 10 U.S.C. § 101(9), members of the organized militia of any state or territory of the United States, the Commonwealth of Puerto Rico or the District of Columbia, not included within the definition of National Guard as defined by 10 U.S.C. § 101(9) and members of the armed forces of the United States.
18 Pa.C.S. § 5515