I call it "Taking B".
Primary: Any SMG... you want to be mobile.
Lethal: IED (anything, TBH)
Tactical: Trophy System
Perks: Reflex, Danger Close, Blast Shield
Reflex is key... you can deploy a trophy very fast.
And trust me... listening to the rage of someone with Blast Shield when you tube them with a kastet or they blow up from your IED is worth the price of admission.