If you want to laser your enemies in warzone and like running AR's, this is a class setup for you. It has the Diamatti's as the secondary but you could always change that to a sniper or the Mac-10 if you like running overkill.

Here are the attachments for the CR-56:

Muzzle: Monolithic Suppressor
Barrel: ZRK Zodiac S440
Optic: VLK 3.0x Optic
Underbarrel: Commando Foregrip
Ammunition: 45 Round Mags

Optionally you can run the Diamatti's as they're a great secondary to have, here are the attachments for that:

Muzzle: Agency Suppressor
Barrel: 7.2" Task Force
Laser: SWAT 5mw Laser Sight
Stock: Dual Wield
Ammunition: Salvo 30 Rnd Fast Mag

Here is some gameplay from FaZe Swagg, credit to him for this setup! Great COD player but definitely one of the top warzone guys.