Did the 14.5 super duty ever come with markings on the rail? Someone offered me a complete super duty upper in black. Upon looking at the pictures, it is center tabbed like all other super duty’s, but there is an nsn stamp on one side, and the Geissele stamp on the other—just like on the urgi rails.
I’ve never seen a tabbed setup with this.
Edit: here’s some pics
https://imgur.com/a/fZI0htg