all u have 2do 4this is go to the cutscene with captian keyes and skip it then when u get controll of mc run out of the room b4 the message in the top left hand corner diossapers if u get out fast anought there wont be any gunts in the left corner as u leave the room then go pick up 2 guns and come back to the room with keyes in it and trigger a chekpoint and walk back out to were the 3 grunts are and you will have 3 guns