I don’t count medium caliber rifles as pop guns when firing at a commercial plane less than 1000 AGL doing around 200 kts as planes do when in an extended pattern.
Any mere individual firearm of traditional basic kind of round is a pop gun compared to RPGs and other true guns expressly meant as a group as MIL armament. And with the distance from airport and angles of runways, I doubt any mere hand-gun could do any damage or even hit.
Already heard it’s because of the traffic of helicopters for the incident.