The way i fight is in three ways
MOST PREFERRED** ---> Use any of the sub machine guns to your preference with steady aim, and stopping power. You can use any perk for slot one.
2nd MOST PREFERRED* ---> Use and AK47 or MP44 with double tap/stopping power, and deep impact, usually use bandoiler for perk slot 1.
When others want to** ---> Use M40A3/R700 with stopping power, steady aim, and bandoiler.