N marked front sight question

[painter777]

Bob,
I found the info BQ shared with us about the IP numbered sights.
Copied and pasted:

It was Irwin Pedersen not Saginaw Gear that initiated the front sights of varying heights. IP precut front sights down from the standard height to one of seven dimensions and stamped a corresponding number on the left side of the sight. When the carbines were targeted they were done so without a front sight. Instead they used a dummy fixture which gave them the height required for the front sight blade. After targeting the appropriate pre-sized front sight was installed. The IP pre-sized front sights ranged in size from 0 - 8, with 0 being the tallest and 8 being the shortest. The #1 sights were the standard height of .795" from bore centerline. When Saginaw Gear took over the IP facility they abandoned the practice in favor of the standard method of firing the completed carbine, then filing the front sight to the appropriate size. Saginaw Gear did use some of the left over pre-sized front sights but they were targeted in the standard fashion.

From his reply #35 in this link:
https://www.milsurps.com/showthread.php?t=20053&page=4

*Note:
Saginaw Gear did use some of the left over pre-sized front sights but they were targeted in the standard fashion.

FWIW