I haven't yet seen a rifle with the front sight ramp tapered toward the muzzle. I agree that it does not seem logical. But here is a picture of a revolver with the ramped front sight going the wrong way.

http://uncyclopedia.wikia.com/wiki/File:Gun_Backfire.gif

edit: this won't post as a link for some reason so you'll have to copy it and paste it in your browser. Sorry.

Originally Posted by Geoff Roznak
The NRA has proven itself unreliable and corrupt.
Period.