Has FN ever tried to make a bigger version of the P90, which would fire 5.56mm NATO ammunition? - Quora
Cartridge Gram - Military Cartridges - The FN Herstal 5.7x28mm round famously fired by the famous personal defence weapon, FN P90, has just recently been recognised as a NATO caliber with STANAG
![Some Pretty Weird Prototypes Preceded the P90 Submachine Gun | by War Is Boring | War Is Boring | Medium Some Pretty Weird Prototypes Preceded the P90 Submachine Gun | by War Is Boring | War Is Boring | Medium](https://miro.medium.com/v2/resize:fit:1100/1*IE5f6zOm6qoccmldcMySeA.jpeg)