2 new weapons and an silverback variant

Looks like an electric maul and some sort of enforcer/pistol automatic pistol. Also i do see some sort of silverback or machine?

Where?
Which timing of the clip is Silverback/Mech?
It’s about time we would need newer weapons of mass destruction against the Infected DeeBees.

Its a possibilty, there is some sort of machine variant in the official trialer about a minute in. I also saw the new guy with a lancer and what looked to be an overkill underneath