Just on the driver thru passenger window and close quarter 2-4 0clocksBeretta px4 compact? Might be a bit on the large side, and is DA/SA, but has ambi controls, and is hammer fired. Looking for a fully ambi gun, especially hammer fired isn't going to net you many options. The s&w ez is an option if you can live without a ambi slide stop
Im not sure how exactly she is getting distracted by ejected cases, ejection on handguns is typically very fast. Is she getting brass to the face?