https://youtu.be/W3l0BmYLnsw The Kuna is a delayed-blowback 9mm pistol/PCC/submachine gun developed by HS Produkt in Croatia and marketed int he US by Springfield Armory. Development on it began in 2020 as a commercial project, but probably also with an eye to military and law enforcement sales. The Croatian police are currently using quite old MP5 submachine