Didn't the T-72B3 variants have been upgraded with 125mm 2A46M-5 gun that should be capable allowed use longer APFSDS penetrator?
No as far as I am aware, only the T-80BVM could handle the new gun and modified carousel. The T-72B3M would require the T-90M turret to be able to accept the modifications
Wouldn't be safer to fry them from the ground with a laser?.And due to the high number of them they will generate an unpassable debris cloud. If not the starlink then the Chinese or Russian one, when the USA start to shoot them down.