The success of Redding's specialized National Match Die Sets has created the demand for to offer additional options beyond the limits of sanctioned cartridges to meet the needs of other precision oriented AR platform shooters. The name change (NM-C) indicates that all of their National Match Die Sets are now supplied with carbide size buttons. The sets include: a full length Sizing Die with carbide size button, the Competition Bullet Seating Die and a Taper Crimp Die