STRATEGY (1) SHOOT AND RUN: Run into battle with SCAR in hand. (Fully loaded). Lock-On. Shoot at enemy. When he shoots back, and you're at low health, find cover. When ammo runs out in SCAR, switch to secondary and shoot with that to finish him off. NOTE: Shoot in bursts to give the cross-hairs time to reset
STRATEGY (2) BLINDED: Throw flash grenade at enemy. When he is running around, shoot him. Simple.
STRATEGY (3) CAUGHT OFF GUARD: Shoot long distance in scope with SCAR. When enemy comes close, use secondary. NOTE: I recommend using 3-round burst for long distance, as it gives time for the recoil to settle.
GOOD LUCK~ any more strategies will be kindly accepted.