MG 4 silenced because its fast and silencers reduce recoil and gun flare. My secondary is normally G18 akimbo.

Sleight of Hand Pro or Bling Pro - MG4 Silenced, Grip, G18 - Akimbo Silenced.
Stopping Power Pro
Steady Aim Pro

I NEVER hip fire because its completely random and wastes ammo imho. I'd rather swap to my G18 or knife. Otherwise, he'll be in range for a rain of bullets anyway.