These pistols have an aluminum frame, perhaps there's some galling or burrs between the slide and frame? Illinois State Police used these guns for some time and abused them badly, with the ammo they shot(+P+) but, all in all, they appeared to be a decent weapon?
Sounds like she got a good buy?
By the way, when this gun first came out, it was offered with two differnt types of mags. Civilian and military. You could also get a dust cover for the ejection port, that was added for the military tests? Fit over the slide stop.