Just no to iron sights, it is not a case of moving with the times,no no no no NO!
It makes aiming far to easy with just about every single weapon otherwise. When you have an SMG with no scope you do not hold the gun to your face to look down the sights do you? No, you do not. That is what would happen if you added iron sights. You would be holding the gun up to your face and against your cheek to aim down the barrel. Don't be so stupid.
The game is more even when you do not have that advantage as only rifles have scopes, as it should be.
It makes aiming far to easy with just about every single weapon otherwise. When you have an SMG with no scope you do not hold the gun to your face to look down the sights do you? No, you do not. That is what would happen if you added iron sights. You would be holding the gun up to your face and against your cheek to aim down the barrel. Don't be so stupid.
The game is more even when you do not have that advantage as only rifles have scopes, as it should be.