Switching to Single Fire mode helps alot IMO. press V with your gun selected and you should see near your ammo counter it says single instead of auto. Aim down sight and tap tap until enemy down. Full auto recoil is unmanageable at the range  that you would encounter enemy. Unless you're clearing room, stick with single fire mode

Im a COD player as well. It is not the same. BF needs you to lead target. aim ahead of where they are. compared to COD. where bullet instantly gets to the enemy. so keep that in mind. Aim ahead of moving target. Keep your hand steady and semi auto only.

oh and STAY IN COVER.

Put your team on your back, wall on your front and sides.
Watch out for high grounds that snipers might try to hide in.
Hug the walls when moving from cover to cover.
check your corners.
If you think you are spotted, fall back to a safe position.

Most of the time i get gunned down when i try to run across open areas getting to the next objective or cover. Using a vehicle helps, but sometimes that is not an option.

oh that and when you're making a last stand and the whole enemy team seems to send their squads on your one position. Load up, bunker down. NEVER DIE WITHOUT A FIGHT!

IMO, playing COD helps alot with my CQB in BF. When it gets up close and personal, i think COD players are better at those gunfights. However medium - long range and objective strategy is BF players turf.