I'm looking at buying a Glock 20SF. The place I'm buying from says it has a "Glock rail", but then shows two different pictures of the gun. Picture 1 seems to show the gun with a 1913 Picatinny-style rail: Picture 2 seems to show what I've assumed to be a "Glock rail", but now I'm not sure which this gun comes with given the other picture: Does this gun really have a 1913 rail on it? I didn't think Glock put those on guns anymore. I'd really rather prefer the slimmer "Glock rail".