Portarock:

Which means level 2 and 3 perks for ranged combat are useless in co-op.

Not exactly, I believe bozo4hire is correct as I seem to remember a video where PM used the zoom/targeting/aiming ability to activate a crosshair that let him target individual body parts, or just aim more accurately in co-op.

It does seem like the zoom function might be useless, but maybe it just automatically makes you more accurate when you hold down Y? Regardless you can still blow off zombies heads and shoot people in the crotch in co-op so its all .

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