I now believe the N has nothing to do with Britishicon Navy. I just asked it as a question as it was there. No broad arrows anywhere.

Cartridge headstamp is F N 68.

Attached are pictures of the plastic/metal snap on sight. I have seen a photo of a similar sight attached to the grenade. But this one does not fit on the grenade.

Attachment 102750Attachment 102749Attachment 102751Attachment 102752Attachment 102753

What rifle does it fit?
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