The problem is with all of the guys with MG4 machine guns they shoot me in the back once I try to advance.
I am not sure what stage exactly you have crossed, i am talking specificaly after you have teamed up with Ghost and the rest of the team and get to the compund from where you have to proceed towards the submarine. The first time Price asks you to use the Predator drone the drone is hit by a SAM site then you slide down a slope and team up with the guys and there is some resistance, you will just have to tough it out keeping your head down and sniping. (BTW using a AK with optics/red dot will be better than a Stegyer)
I am talking about the next stage once you get to small hillock overlooking the compound Cpt Price asks you to use the drone again; my earlier post was talking from that stage. Besides the game gets auto saved from that stage since its an objective succesfuly attained. As far as getting flanked move with the team and crouch whenevr you use a drone, try to limit the usage to max 2-3 times and only on targets which can get max casualities (i usualy hit only fuel tanks).
So once again. Hillock - Drone - Hit fuel tank destroying Helo, BTR and jeep - snipe guard unit, get into the open snipe from long distance - move towards a vehicle crouch take out Fuel Tanker vehicle behind double static tanks - move to left snipe the guys enroute watch out for the guards who are on top who come down via stairs. Use drone once more on the guards and vehicle on the left of building near the sub. Rush through that spot head towards the sub running crazy. Once you reach the sub the game gets auto saved and then you will have to head to the terrace of an adjoining building while price does his stuff
All the best....