Has anyone got any photos of actual M21 receiver markings? And no, I don't mean XM21, but specifically the M21. I've heard the M14NM markings were ground off and re-engraved over with "M21", but I've never seen any actual photographic confirmation. Any help would be greatly appreciated.

Please note i did NOT make this list, i only found it online. So all credit goes to the person who did all the work by researching and making this list. Mods if this is not allowed or incorrect please delete this. All of the Harrington & Richardson Arms subcontractors are listed below. Company...