the bolt carriers on all 4 unidentified rifles have the akm stepdown pattern and odd grey worn metal look like paint was cheap and on bare metal. that might lean towards a Khyber clue if all are same fake rolex copies made in paki afghan shops. rifle next to radio has oddly pronounced palm swell ive seen before on rare occasions on Russian and Romanian but very possible on Khyber. ive got to go with my gut instinct here and say Khyber pass rifles is best bet. hard to tell without trunnion pics and better pics.