just found a used NEGC rear sight and need help on how to adjust the windage on these. Thanks Elmer.

Don't have mine in front of me now, but as I remember it uses opposing screws. If you want impact to move right, loosen right screw, tighten left screw, ect.. Trial and error, time consuming and tricky.

jk is correct, jus sighted mine in the other day.

You also have to loosen the set allen screw first, and remember to retighten it afterwards!

As to the vertical, the peep itself acts as a lock, so loosen the peep to make the vertical adjustments.

Thanks for the info. It looks like I have the wrong peep as the elevation will not tighten up. Thanks Elmer.