Modern Warfare 3 - Overkill perk, helpful to Cops n' robbers!

I unlocked the Overkill perk, which grants the ability to use another primary weapon in place of the secondary weapon.

It looks like we still can use both a Riot Shield and Shotgun.

Hopefully Overkill doesnt conflict with any required perks for a cop. The Overkill perk is in the 2nd Tier of perks.

That is very good news.