M14 Operator/Org Maintenance/Repair Parts & Special Tools Manual
The title of this Army pub is "Operator/Organizational Maintenance/Repair Parts & Special Tool Lists for the M14 NM" which as implied covers the National Match M14. Use the parts numbers to search out those now HTF parts on the internet.
19 page Army manual, 1968, covers basic items, maintenance, repair parts, special tools and equipment for the National Match M14 rifle, with parts illustrations. Most parts are identical with the standard M14 rifle.