I switch it up, probably like others for different types of maps. But my main loadout is:
Scar H with silencer / AA12 (Iron Sights)
Semtex / Flashbang
Sleight of hand pro
Stopping power pro
Commando pro
Painkiller
I switch it up for different maps like for rust and small maps I use high mobility with a tactical Knife
For Estate, I use a tactical insertion and put it up on the 2nd level of the estate so I can kill and re-take the estate easily.
For 1v1's I use everything silent and ghost around
What do you guys do?