M&P Shield...
I purchased a new(not a floor or display model)
no thumb safety 9x19mm Shield. It was test fired & left MA on 11/14/2014.
I have not shot it yet but plan to in the next few days.
I too noticed a few issues with the short slide but I chalk it up to the engineering & basic physics.
A short slide has less weight/
mass so not going to function quite the same with springs or other moving parts.
I do not have
large hands but I've been
bit 2 times loading & unloading the Shield,
. Be careful
not to have your palm blocking or near the opening of the mag well as you insert it.
I've noticed too my hand/palm may cover the muzzle
too when I load a 9mm round quickly or work the slide.
Be careful with the Shield.
I also had a minor flaw where the 9mm pistol didn't go
click when I did the M&P re-assembly.
I've owned and cleaned many firearms but never had a brand new gun not function properly after cleaning/inspection.
I took the small pistol apart and re did the steps. It loaded and could dry fire without any other problems. I was concerned that I broke something.
I'm not real thrilled that S&W no longer puts
Melonite on the M&P series guns. I owned a older 9x19mm full size that had minor scuffs & knicks on the flat black surface but this brand new Shield already has a long streak on the inside frame. I might get the Shield upper coated with Cerakote or Metalife so it's not a big deal. It could have better QC.
Finally, I'm not happy that the Shield pistols don't share the M&P line ambi magazine release that can be quickly converted.
I'm left handed and prefer to switch the release on carry-duty pistols.
I looked into buying a new 9mm S-A XD mod 2 sub compact but the Shields had a lot of holsters & gear + a good reliability rating with many S&W owners.
If the M&P Shield falls short or becomes unreliable, I might buy a new Mod 2 XD.