c/World War I anti-aircraft guns

Information
lexicalization	eng: World War I anti-aircraft guns
subclass of	(noun) a weapon that discharges a missile at high velocity (especially from a metal tube or barrel) gun
has instance	e/QF 12 pounder 12 cwt AA gun
has instance	e/QF 13 pounder 6 cwt AA gun
has instance	e/QF 13 pounder 9 cwt
has instance	e/QF 13 pounder Mk IV AA gun