Odd Screw in Rear Sight?

Hey all,

I don't mean to bloat the forum, but I'm not sure where else to ask technical questions. I'm still learning about M1 rifles so I am bringing all my questions here to bother the experts.

I'm looking at a particular rifle that has an amalgam of parts assembled into the rear sight: a Springfield Windage knob, a Winchester Lockbar, and a Winchester Elevation Knob. The screw holding the Elevation knob is what is standing out as I have never seen that before. It doesn't look like a screw on the T105 sights, just a regular old screw. Has anyone seen that before?

Attachment 129073

Finally figured out how properly upload photographs. Thank you Bob for the walkthrough! :)

Respectfully,
- Michael

You're quite right, just a round head slot...have you taken it out to see what thread is present? Here it is in blowup...

The rifle is admittedly not mine, I saw it as a listing online. It is a 6 digit Winchester with Winchester parts (although not contemporary to the receiver).

It is a peculiar piece that stuck out to me. I doubt any armorer would jerry-rig a design like that at an arsenal.

Quote:

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Originally Posted by Ms15710

I doubt any armorer would jerry-rig a design like that at an arsenal.

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No, correct screws are even available to the layman...

It is not just a small machine screw but manufactured to fit the pinion and hold the elevation knob tightAttachment 129080Attachment 129081

Quote:

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Originally Posted by RCS

not just a small machine screw

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Well, the outside screw is a screw...and it's wrong. The outside is holding things tight I guess.

The trouble is if someone has forced in a screw with the wrong thread they may have messed up the thread in the part that the screw fits into, the pinion.

Quote:

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Originally Posted by Flying10uk

they may have messed up the thread

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Yes...