As for the video, it's highlighting changes over the old design. The guy was presented as a court expert (considering his oratory skills, I wouldn't want him on MY side in court lol) but no other creds listed. Some of the features he pointed out were the 6 position adjustable stock (really went on and on about it - how it's user-friendly, adjustable to the user regardless of the physical constitution, blah blah blah, yadda yadda yadda), being able to switch whether the cases get ejected to the left or to the right on the fly, added dust cover, ambi no pew-pew-pewpewpew fun switch, carry handle rail (now lower and longer), highlighting side/bottom rails , optional accessories including foregrip, reflex sights, bayos, 40mm launcher (designed not to mess with the ergos and balance). I don't speak "Croatian" or "Serbian" or "Bosniak" or "Montenegrin".. I speak Serbo-Croatian, which used to be one language until a bunch of people in those countries got into crack, meth and who knows what else and started writing nation-building fiction. I think they even came up with new alphabet letters in Montenegro. It's like speaking Canadian, Australian or Texan.