Looks like a 30mm CIWS (AK-630?) in the "upper turret" too.
EDIT: After a quick bit of google-fu:
http://russianships.info/eng/borderg...oject_1248.htm
They are armed with the T-55 Turret complete with its main gun and co-axial MG, a AK-360, a couple of .50 cals, a grenade launcher and a couple of 140mm rocket launchers! not bad for a 120' boat.