The Northrop P-61 Black Widow had a gun mounted that was designed by whom?
Northrop P-61 Black Widow The Northrop P-61 Black Widow, named for the American spider, was the first operational U.S. warplane designed as a night fighter, and the first aircraft designed to use radar. The P-61 had a crew of three: pilot, gunner, and radar operator. It was armed with four 20 mm (.79 in) Hispano M2 forward-firing cannons mounted in the lower fuselage, and four .50 in (12.7 mm) M2 Browning machine guns mounted in a remote-controlled dorsal gun turret.
L. James Sullivan Leroy James Sullivan (born on June 27, 1933) is an American firearms inventor. Going by Jim Sullivan, he is noted as a designer of several 'scaled-down' versions of larger firearms.