antiaircraft antiaircraft gun flak flack pom-pom ack-ack ack-ack gun
antiaircraft%1:06:00:: antiaircraft_gun%1:06:00:: flak%1:06:00:: flack%1:06:00:: pom-pom%1:06:00:: ack-ack%1:06:00:: ack-ack_gun%1:06:00::
artillery designed to shoot upward at airplanes