I didn't call It last stand because you guys would be like OMG NO THIS GME WNT TURN IN TO CALL OF DUTY.
Lot's people don't use squads or don't know how to but I'm suggesting it anyways. Most of you rifle men rushers has gotten sprayed by an smg, So If he sprays you in like an arm ( part of the body not the head ) or something you'll go down for maybe 15 seconds by default and If you don't click like the key F or something you can stay down until a squad mate revives you. You can revive your squad mate by pressing F and he gets healed 30% by default and you can continue your battle.
I forgot to mention If you're In hurting mode ( whatever you guys want to call it ) you can still shoot but It won't be as accurate as the gun was before.