I see something that looks like a Browning Hi-Power on the bottom pic, one with wooden grips and a PPSh (russian ww2 smg) on the second pic from the bottom, next to the guns drum magazine. Also on 7th pic from the bottom something that looks like russian semi auto belt fed 30mm AGS grenade launcher. Ammo belt on one of the pics looks like it came from Maxim machine gun.
Also, that bunch of big MGs looks like a 14.5mm KPV's.
P.S Wanna see piles of guns 100 times bigger, check this out
http://www.project-x.org.uk/armsdumpindex.html
Don't really know where that stuff came from, some people said it's Vietnam after the war.