Wanted to pass this along to everyone, I just received a letter from Smith & Wesson, concerning my pistol. Thought I would pass it along...it concerns the new M&P Shield Pistols manufactured before August 19, 2013, all calibers. Seems the trigger bar pin could damage the lower trigger in a way that when dropped, the gun will fire. If you haven't received a letter yet, but want to check your pistol, here is how to do it.... Mine was OK.
http://youtu.be/jsQWGS-P9Pk