My Loadout:
Feline
Red Dot
Silencer
Extended Mags
Energy Transfer
Stealth Enhance
Weapon Pro
I am thinking about changing from using a red dot to using a laser sight, but its kinda hard to be stealthy when u have an uber long laser pointing out of your gun, especially when it shows while I'm in stealth. That's a bug that I don't understand why crytek hasn't fixed by now.
I also have a scarab loadout but I don't really use it. The feline seems to work good in most matches. Supposedly the feline is limited in range but I don't really engage in many long range fire fights. Even as the K-volt was patched I still dont really use it.