I bought a couple of Shield 1.0s a few weeks a part back in like 2014-15. As I recall, the first one might have pushed an inch or so left, but it was so my first experience shooting a slim profile 9mm. The second was spot on as I recall. Had to be capable of hitting an FBI Q target out to 25 yards so I would have shot both at that distance. Anyway, one sits in the safe, one sits in my father's safe, and I haven't shot one since probably 2019. I went with a Glock 43 and later a 43X. With semi autos in general, I haven't shot a tendency to push left. That is a grip issue, not the sights. Anyway, I'll attest that the M&P sights, Shield included, are pressed into a dovetail so tight the only safe way to change out or adjust is to use a sight tool. Or let a gunsmith have at it.