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So here's how I understood Post #1
"U" Notch rear sight vs. Square Notch rear sight
Good examples to compare are Ameriglo Agent (round) and Ameriglo Bold (square)

Ameriglo Agent
[Linked Image from s19.postimg.cc]

Ameriglo Bold
[Linked Image from farm8.staticflickr.com]

Ignore the dots and look at the basic shapes of the sights.
This is strictly a personal preference thing. One is not better than the other.
I have both, but I like the square bottom rear sight.

For fun, we like to break clay birds set out on a sandy bank about 50 yards away.
For that, I like a Dawson Competition rear sight (serrated, no dots) and a .040 red fiber optic front sight (narrow sight with a clean steel top)
We have one combat shooter in the group and he laughed when he was first told of the clay birds.
When the birds started breaking, he quit.
It's really not hard to do. On this sandy bank, you can walk your shots in.


B L M - Bureau of Land Management