I saw a video of someone using this class so i tried it and its amazing! U set down c4 in a choke point and dance around with your riot shield, the enemy runs toward you to knife/semtex you, double tap square/x to blow up the c4 he didnt even notice! Scavenger get more c4, Repeat. On afghan i went 21-5 which i consider good since i only used c4 and my riot shield. TRY IT