My setup still depends on teh map but

Class 1
Primary - Barret .50 Cal with Silencer and FMJ
Secondary - M1014
Equipment - Tactical Insertion
Grenade - Stun Grenade
Perk 1 - Bling Pro
Perk 2 - Stopping Power Pro
Perk 3 - Steady Aim Pro
KillStreak - 9 Kills Pavelow, 11Kills Chopper Gunner, 25Kills Tactical Nuke

Class 2 (Hardcore Camping/Non Snow Map)
Primary - Barret .50 Cal w/ Thermal Scope
Secondary - Nothing
Equipment - Tactical Insertion
Grenade - Flash Bang
Perk 1 - One Man Army Pro
Perk 2 - Stopping Power Pro
Perk 3 - Steady Aim Pro
Killstreak the same

Class 3
Primary - ACR w/ Silencer & Holographic Site
Secondary - M1014 w/ Red Dot & FMJ
Equipment - Semtex
Grenade - Stun Grenade
Perk 1 - Bling Pro
Perk 2 - Stopping Power Pro
Perk 3 - Steady Aim Pro