Greeting from today's Duty Nitpicker!
Using ZSU 24/4’s?
Actually, it is a ZSU 23/4 (as in 23mm bore).
(BTW, while landing at a small airport in Uganda, I once had a Tanzanian Army-manned ZU 23/2 fire about 120 rounds at me from a distance of 100 meters. My clearance was sitting on the airport manager's desk. He forgot to tell the gunners that I was OK to land...)
ZU-23/2
OMG!!! My typo? I was off a milometer. 4 years teaching Soviet Offensive Operations 35 yrs ago. Hey I was younger then and I had a better memory. Going on 83 now, but still 19 inside. Too bad, if I lost it totally, I could run for President now at my age still going on 8 cylinders, not 1 and a half, as the Current POTUS.