Today's Daily Sale are the "2nd Round" (notably have a larger Magazine Size) SMGs: PDW-16 Hailstorm (TR) Blitz GD-10 (NC) Sirius SX12 (VS) You can see weapon details here. They are normally 700 SC/1000 Certs, but are 350 SC with the sale.
Sadly, I already have it. I've been getting pretty darned unlucky with this daily deals. They've either been cosmetics I don't want, or weapons I already have. -_-