AR15`s front sight graduations?

Each notch on a standard A2 front sight is equal to 1 inch at 100 yards.
There are 4 notches , so one complete turn would be 4 inches.

I have a NM front sight, so I cant just go 1/4 round, it has to be a full turn.

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There are 4 notches , so one complete turn would be 4 inches.

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Why would they make it like that?

Because a hit anywhere in the torso area at 100 yards with XM-193 will almost certainly be enough to make the bad guy think about what he's doing. The military doesn't need 1moa accuracy out of its grunts, they just have to hit the target somewhere.........

There's a slightly crisper sight picture if the side facing the shooter is wider than the side away, and the top also tapers away from the line of sight. The NM tradition for such front sight treatment may have begun with the M1, but for all I know they started with '03 Springfields. They were the first to have accurate speciments selected for match use.

I take it you are trying to set up your front sights?

The standard from my sights one full turn comes out to 3 1/2 minutes.
Which is close to the distance from any edge of the black to the center minus 1/2 minute on national match sights.

When setting up your sights start with the front sight post base even with the front sight base and see where it shoots. You should have several minutes down with a 200 yard setting and that will also allow you to use either a 6 hold or a center hold either at 100 or 200.
My standard sight setting for 200 yards with a 6 hold is 39 1/4 clicks or 9 3/4 minutes which lets me go down my 3 minutes if I wish to use a center hold and down a few more minutes if I happen to shoot a 100 yard practice.
I also have one rifle at that setting that will not go down far enough like that so if I shoot that one I would have to turn my front sight but I hate to do that .

Because a hit anywhere in the torso area at 100 yards with XM-193 will almost certainly be enough to make the bad guy think about what he's doing. The military doesn't need 1moa accuracy out of its grunts, they just have to hit the target somewhere.........

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Interesting explanation, but that's not a milspec sight post. The military sight has four notches.

There's a slightly crisper sight picture if the side facing the shooter is wider than the side away, and the top also tapers away from the line of sight. The NM tradition for such front sight treatment may have begun with the M1, but for all I know they started with '03 Springfields. They were the first to have accurate speciments selected for match use.

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That one makes more sense.

I was under the impression that NM stuff for the AR is just marketing. That there was no actual National Match AR ever made. CMP/HP rifles would be a different animal I assume?

You asked why they would make it for one click equaling one inch didn't you?

If not, then I must have misread your question.

You asked why they would make it for one click equaling one inch didn't you?

If not, then I must have misread your question.

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True enough. I did. I meant in the context of the target sight indicated though.

Ahhh ok.......I've never even shot with an NM sight post, had one given to me but I gave it away.......I learned to shoot the AR with the fat post and I'm comfortable enough with it.