I really want to have a class who can dual wield pistols aswell as a sniper class
… Maybe they will implement this in the SR C3 or Musketeer C2/C3?? can someone confirm this if this is possible 
As pistols are a subweapon, no it’s not possible.
I wouldn’t be surprised if they added a mainhand type gun in the future, like a shotgun or something, but I don’t expect it. Very unlikely you’ll ever be able to dual pistols though.
Probably, have a class who able to wield pistols on main hand? that would be very cool, since pistol’s attack isn’t that high, i think its viable.