The 3 set-ups I use:
Assault:
Scar-H with Silencer and ACOG
PP2000 with Silencer
Semtex
Flash Bang
-Perks-
Bling
Stopping Power Pro
Commando
Sniper:
Barret .50 with Thermal Sights and Heartbeat sensor (this is fucking epic)
PP2000 with silencer
Frag
Flash Bang
-Perks-
Bling
Cold Skin
Steady Aim Pro
SMG:
P90 with Red Dot and Rapid Fire (gunna try akimbo P90s tonight)
AA-12
Throwing Knife
Stun
-Perks-
Slight of Hand Pro
Stopping Power Pro
Steady Aim Pro
Assault:
Scar-H with Silencer and ACOG
PP2000 with Silencer
Semtex
Flash Bang
-Perks-
Bling
Stopping Power Pro
Commando
Sniper:
Barret .50 with Thermal Sights and Heartbeat sensor (this is fucking epic)
PP2000 with silencer
Frag
Flash Bang
-Perks-
Bling
Cold Skin
Steady Aim Pro
SMG:
P90 with Red Dot and Rapid Fire (gunna try akimbo P90s tonight)
AA-12
Throwing Knife
Stun
-Perks-
Slight of Hand Pro
Stopping Power Pro
Steady Aim Pro