i have a gen 2 glock 19 and i have had two opportunities to trade it one for a gen 4 glock 23 and the other a gen 3 glock 22. just was wondeirng if there was a reason i have had the offers to trade it. is there something wrong with the .40 caliber or just a strange occurance. i was thinking about trading for the glock 23 but the two offers to trade for a .40 caliber have made me skeptical.