Ill add to the list of accolades and help the undecided.

I purchased my 15 Saturday morning and ran out to the the Ben Avery Shooting Facility and ran 300 rounds through it.

I purchased additional PMAG Gen3 with windows. All of it was perfect.
The 15-2 came with magpul foregrip 10305 model.

Not a single malfunction, not a single issue. All for 550.00 Un freaking real.

I remember buying a New Colt LE M4 and 20 years ago and back then it just seemed typical of new AR's that had to be broken-in cleaned and lubed, different mags bad ammo etc.
The only AR I purchased new that did run well was a BUSHY M4.

Whatever SW is doing these days they seem to be doing it right. All my SW weapons run perfectly out of the box. I just couldn't be happier.