An acquaintence of mine attended the Glock armorers school, and tells this story. The instructor on the firing line unlimbers a loaded G17 and hurls it at the RR tie backstop, as hard as he can. He then goes over to it, whereupon he steps on it, grinding it into a soft-loam/sawdust mixture. He digs it out w/ the toe of his boot, and then kicks it repeatedly back to the firing line. He then calls the line hot, picks up the piece, and empties 17 shots as fast as he can downrange. Nary a hiccup. I have 5 Glocks now.