Ah my friends and relatives the Russians and the indestructible AK-47.
I saw a film a while back making its way around the Internet. It showed how indestructible the AK-47 was. First the gun was dug out of the mud, see they are rust proof!!, then its dropped out of a building and run over by a truck. Then the army guy picks it up and fires it full auto.
Now I own a couple mil spec AKs (not full auto though), and I can flex the receiver with my fingers, and guess what its sheet metal!! If you really burried on in the mud for a week you would dig up a pile of rust, and if you ran it over with a truck or even a small car, the receiver would be badly bent or crushed and there is no way the gun would fire...
But who am I to cast aspersions on other's fantasies of indestructibility.