I came across this in a group of parts, its not like the others... marked E over D, with a forked surface for the plunger to engage, blacked with a ground off battle sight, a standard micrometer screw neck is to large to enter the body.

Best I come up with is a Trials Rifle sight that was converted for use on a 4T? What do you say?Attachment 104987Attachment 104988
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