[IYAS9YAS]

The revolver pictured is at least 7 or 8 shot, not six. Just count the chambers in the cylinder.

It's a hexagonal "cylinder" with a chamber at each corner. I count six holes.

[CurlyDave]

Now that I magnify the image I think you are right. Somehow they do not appear to be evenly spaced, which I think is an illusion caused by the low quality image.