How is that first Luger in that good of shape?!
Also, why does that first ammo belt look like it contains blanks?
has to do with the amount of oxygen where it was sitting.....if it was in a chunk of ground with low O2, even in water it wont rust as you also need oxygen for rust to form which is why there are some wonderfully preserved wrecks in deep freshwater lakes in low oxygen zones
Their "anti-tank gun" looks a lot like the receiver/magwell from a Mosin Nagant as well.
prolly this beast:
unfortunately i cant find a pic without a stock to compare and most my reference books are still boxed up at my brothers