I notice yours has smith & wesson grips. I think there was a recall on those grips. Most of the 4516's I've seen have Hogue's. I guess alot of people switched them out rather than send them back for replacements
Just got back from a range trip a little while ago and finished cleaning up the guns i shot today. The 4516 was flawless although the factory grips are a bit slippery in my hands, Installed a set of Hogue rubber grips i bought at a local shop. Also got some time in with an M&P 9c and my 586 no dash. Everything worked perfectly.
So are you happy you got it then?