flush nut lockbar

[BFJ]

yesterday I was carring a springfield m1 for a VFW function and noticed that it had a lockbar sight and what I think is a flush nut on the left side , I know it had two triangles on it. Could someone tell me what serial range they were made for. thank you

Information

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[browningautorifle]

The flush nut was replaced by the lock bar. They are on the same side. Windage. Right. The other side is the elevation.

[Prince Humperdink]

Here is a good site.
Rear Sights

[BFJ]

thanks, I'll have to look at it again to see which one it is.