Reread it. They put [url]www.AR-15.com[/url] which leads you somewhere else, not AR15.com. D'OH!
It also has incorrect info regarding .22 conversions and SB23 legality.
It also mentions bolt carrier rails or something like that. That's another gun, AFAIK.
They also compare the "force" of the different bullets. Incorrectly.
Besides that, it's vague....but welcome.