Assault: XM8 and M416
Engineer: XM8compact and UMP95 (but the 9a-91avtomat get more damage)
Medic: MG36 or XM8 LMG (all weapon in this class are overpowered)
Recon: GOL for long range shots, SV98 for assault recon.
Shotguns: saiga
Pistol: mp-433
I like the c4 too