The accuracy issues with the FS 9mm M&P are real. I'm sure S&W redesigned the barrel for a reason. You may get a good one or you may not,or it may be mediocre.Hilton Yam is running some tests over at the 10-8 site and you can read here:
10-8 Performance: June 2012.
I have a FS Range kit model and it shoots about 4" at 7 yards and opens up from there.This is with common 115/124 FMJ standard pressure types of ammo.I did get some vertical stringing and shooting low 2-3" at 7 yards on slow fire drills.
My gun has the new style barrel and it shoots like ****.
I sent it back to S&W and they returned it saying it was in-spec and no repairs were needed. I don't know what their specs are but any of my other 9mm platforms will out shoot the M&P FS 9mm by a considerable margin.
I understand how some folks feel that it may be Internet banter since most folks don't really shoot handguns all that well.But some quality research will show that there is a problem with this particular variant(full size model).
KKM and Bar-Sto are working on barrels for a reason.I don't feel like spending more money on a product that should deliver 3-4" groups at 25 yards with most ammo types.
I'm going to run some more types of ammo and some 147s.Some folks report that the 147s are the most accurate.I'm curious as to why S&W used such a slow twist on both barrel types 1-18.75 and 1-24 when most manufacturers use a 1-16 twist for 9mm.Even KKM is using a 1-24 twist on the M&P barrel
I'm going to shoot some of my other 9mm service type guns with identical ammo and send the targets to S&W customer service for a follow up complaint and see what happens.
Three new S&W handguns and two have been stinkers.At least S&W replaced my BG38 revo with a new one and it has been reliable and a lot more accurate.