The new weapons for the upcoming update are:
M46 "Jackal" Assault Rifle
The knife lies between the Katand and X3 knife in it's stats, and is more "stabby".
The MD24 comes with pistol whip ability and a laser sight.
The XMk5 comes with nice reflex sights and a cool Stun / Poison dart launcher to make easy prey of your foes.
The M46 is equipped with a short range scope and handy proximity grenade launcher.
The other 2 new weapons will be revealed soon :)