Possible.
In 1982, even the SAS/SBS wouldnt be overly au fait with Stingers, at least not in a war. They’d have been more au fait with say the Milan anti-tank weapon.
Do you have anything on the aircraft loss ratio, Argies vs. Brits in the '82 war?
I remember sitting next to my dad, who has since passed on, watching television reports of the fighting. Dad was aghast at how idiotic Argentine was for directly challenging the RAF, shouting something to the effect of: "X Almighty, don't they teach history in Argentina?"