noun
anti-aircraft weapon
Military term for weapons designed to attack aircraft, such as anti-aircraft guns or missiles.
基地には対空兵器が配備されている。
Anti-aircraft weapons are deployed at the base.
対空砲 specifically refers to anti-aircraft guns, while 対空兵器 is a broader term covering all types of anti-aircraft weapons including missiles.
Compound of 対空 (anti-aircraft) + 兵器 (weapon).