OA states that Vickers went to the Erasmus University in Amsterdam. It is actually located in Rotterdam.
The opening scene takes place at 'Blackbush Airport, London, UK'. The airport is actually located in Hampshire, which is about 40 miles away from London. Also, the correct spelling is "Blackbushe".
The FMG-148 is not laser guided but thermal guided fire and forget.
At the end when they open one crate to inspect FGM-148 Javelin you see a sight block attached to a tube and next to it a missile. Modern missiles are to fragile to survive field conditions unprotected so they are shipped in protective containers out of production. This container/tube also doubles as launch-pad. The operator just connects the sight-block to the tube and aims. After firing the tube is discarded.
At the end of the episode, Maggie suggests OA join her at "McSoreley's" because SIU is buying "on a federal credit card." The only such bar in NYC, McSorley's Old Ale House in East Village, is cash-only. Also, the bar is misspelled "McSoreley's" (extra 'e') in the closed captions.
The opening scene supposedly takes place at an airport in the UK. But all the vehicles are left hand drive with non-UK number plates.
While the refueling truck from the airport is supposed to be British, it is clearly of U.S. origin.