MIL-G-45500D, MILITARY SPECIFICATION: GUN, AUTOMATIC, 20MM, GENERAL SPECIFICATION FOR (30-JUL-1974) [S/S BY MIL-DTL-4500E]

MIL-G-45500D, MILITARY SPECIFICATION: GUN, AUTOMATIC, 20MM, GENERAL SPECIFICATION FOR (30-JUL-1974) [S/S BY MIL-DTL-4500E]., This specification covers the general requirements for multi-barrel, electrically fired, 20 millimeter (mm) automatic guns. Additional requirements for specific models of the 20mm automatic gun are on specification sheets which are included as a part of this specification. The 20mm automatic gun is intended for use on fixed and rotary wing aircraft and for use on ground to air anti-aircraft weapon systems.