One of the more interesting Forgotten Weapons episodes was a view request on what Ian would do if he was a officer procuring small arms for the nation of Elbonia post WWII- with the added catch that he was a secret agent meant to sabotage that nation's armed forces.
Everything had to be at least outwardly plausible, so no notably unreliable weapons like the Chauchat LMG.
Anyway, it would be interesting to do a modern version of the same sabotage challenge, but using modern weapons. Elbonia needs the following:
-Sidearm
-PDW
-Standard infantry rifle or carbine
-Designated Marksman rifle
-SAW
-LMG