The attached db_countries.lua is for beta 2.7.18.30765.
Add the following line to db_countries.lua(DCS World/Scripts/Database/) to fly MiG-29S in the Syrian Air Force.

--SYRIA
local units = country:get("SYRIA").Units
	cnt_unit( units.Planes.Plane, "L-39ZA");
	cnt_unit( units.Cars.Car, "p-19 s-125 sr");
	cnt_unit( units.Cars.Car, "Ural-375");
	
--Historical mode Aircraft SYRIA
	cnt_unit( units.Planes.Plane, "An-26B");
	cnt_unit( units.Planes.Plane, "L-39_MAC");
	cnt_unit( units.Planes.Plane, "MiG-15bis");
	cnt_unit( units.Planes.Plane, "MiG-15bis_MAC");
	cnt_unit( units.Planes.Plane, "MiG-21Bis");
	cnt_unit( units.Planes.Plane, "MiG-23MLD");
	cnt_unit( units.Planes.Plane, "MiG-29A");
	cnt_unit( units.Planes.Plane, "MiG-29S"); <----------------------
	cnt_unit( units.Planes.Plane, "Su-24M");
	cnt_unit( units.Planes.Plane, "Yak-40");
--Historical mode Aircraft SYRIA--end

--Historical mode Heli SYRIA
	cnt_unit( units.Helicopters.Helicopter, "Ka-27");
	cnt_unit( units.Helicopters.Helicopter, "SA342M");
	cnt_unit( units.Helicopters.Helicopter, "SA342L");
	cnt_unit( units.Helicopters.Helicopter, "SA342Mistral");
	cnt_unit( units.Helicopters.Helicopter, "SA342Minigun");
	cnt_unit( units.Helicopters.Helicopter, "Mi-24V");	
--Historical mode Heli SYRIA--end
