That makes sense, though it's usually just referred to as "AA" or "AA-guns/cannons".
*Tadaaa~*Sensei! Flies! They're flying like crazy!Kuh... Darn flies...!
Don't just invite yourselves in here!Sensei, let me try! I'm good at that kind of stuff!Haaah!Whaaat is it?Arisu-chan! Come over here!Hmhm! Katyusha really is taller than you!