I've tested all the new marksmen weapons and found a strange bug with the Navid machine gun.
You can switch between full and semi automatic. If you shoot your gun in semi automatic mode, your machine gun shoots three rounds at once (all three rounds exit the barrel at once). There is no spread and all three rounds will hit the target at the same time with a 100 percent accuracy.
I think it will be realistic, if the Navid fires three rounds one after another with a delay and a little spread.