My Run and Gun class is:

P90 with Red Dot
.44
Semtex
Stun
Scavenger
Stopping Power
Commando

or

M4 with Holographic
.44
Semtex
Flashbang
Sleight of Hand
Stopping Power
Commando

My Sniper:
Barrett .50
PP2000 with Red Dot
Semtex
Flashbang
Marathon
Stopping Power
Commando