MIL-F-85668 Fire System, 20-Millimetre Point And Suppressive Helicopter, Ah-It \(Tow\), A/A49E-7\(V4\)This specification establishes the requirements for performance, design, test, manufacture, and acceptance of the A/A49E-7\(V4\) AH-1T \(TOW\) Helicopter 20-Millimetre \(mm\) Point and Suppressive Fire System, hereinafter referred to as the system.