I've got two of the NECG sights, one for the Ruger and one that fits on Weaver mounts. The Ruger model is basically a block of metal with the peep running through it and I found that it blocks off too much of your field of view. Also, when you remove or use a large diameter insert the view is squared by the straight sides of the sight interior. For lack of a better description it's shaped like the flattened capitol "O" on a computer.

The Weaver sight is too ugly to be seen in polite company but it rides on my blackpowder rifle because not too many people are in the woods in WV during December.

I wouldn't mind a sight you have to drill and tap, just for piece of mind knowing it was firmly attached.

Rick