I'm not really posting this for a survival piece...although, it would probably be a lot quieter than a silenced pistol, although, if you carried around the hand-pump, I guess you could keep firing until you ran out of bullets. I just though it was cool...I was thinking "real quiet slug gun." Cabela's: Benjamin Rogue .357 ePCP Air Rifle
Outa my league, for sure. Do a site search on rickdoug. He's been absent for a long time, but posted a lot of stuff on airguns some while ago.
Saw one online awhile back that was a .50cal..It didnt have any more velocity than an airsoft gun.It wasnt much on penetration,but you could definitely crack a skull with it @50yrds. Matt