Oh, I built my class Spec Ops for Rushing:

Weapon: MP5 stock.

Handgun: UPS stock.

Perk 1: Bandolier.

Perk 2: Stopping power.

Perk 3: Deep Impact.

With this class, I can finish enemy off as fast as i fire, penetrate any camper throught wall. And kill sniper with tapping skill if his position isn't so far.

I aslo built may Assualt class, LMG & Sniper like that. And all of weapons I use are stock. Yeah, this is my style.