"Striker" shotgun.
"Protecta" shotgun.
AKS-74. Looks to be a 74U with a new stock [telescopic, but probably based on the various underfolding stocks on 74 clones], suppressor [that for once is actually pretty loud] and reflex sight.
The classic one-grip fake RPG-7. Weirdly extended tube; it looks almost like they flipped the grip of an RPG-2 around and stuck the back end of an RPG-7 on it.
There's also a generic sawed-off double-barrel called the "Spectre;" that's just going under 12-gauge double barrel, but I'm not sure if it's named after a different shotgun like the others are [Remington Spartan, possibly, since it's made in Russia]. And the VX Carbine and Korbov; the former wasn't in the previews and is clearly an M14, the latter is so blatantly a G36 it isn't even worth a picture, and the preview picture looks nothing like the in-game model anyway.