I guess anka4 will not be an unmanned fighter like kızılelma,it must be a bigger version of anka3 with two engine ,thats a big step but with little effort
There is a long article on defence turkey.Aselflir 500 is for general puRpose use,600 has larger gimbal for high altitude use-over 40.000 feet and merops like 500 but for performs better for unusual situations like fog,dust etc…