That's much the same conclusion I came to a few posts backI think that bit sticking out below her fingers may not actually be handle. the way her pinky finger is spread down, it looks like it's curling under the bottom of the normal grip, while holding an item against the lower part of the grip (which is that piece sticking out). Looks like it could easily be a credit card sized thing that she's holding with her right hand, while also gripping the gun.
Although I think the silver square thing is actually the belt buckle.