Hey guys! just wanted to bring out a shotgun class.
Primary: KSG or R870 MCS - Silencer Laser Sight Fast Mag/Quick Draw Grip
Secondary: N/A
Perk 1 - Flak Jacket
Perk 2 - Fast Hands/ N/A
Perk 3 - Extreme Conditioning
Lethal - Grenade /C4
Tactical - Pikachus
With the R870 MCS or KSG you get range and stopping power. Having Flak Jacket is helpful for hardcore for obvious reasons. No middle perk will allow you to have two Tacticals, giving you more of an ability to cover your ass. I prefer Extreme Conditioning because I run with my shotgun; and grenade and C4 is nice because its pretty much a guarantee kill if you throw it out.
I hope this helps!