The AR-15 Armor Punch Set contains all punches needed to assemble an AR-15 Lower Receiver. They are made from 4140 alloy steel, heat treated, and QPQ finished. Includes: 3 starter punches, 3 roll pin punches, 1 flat punch, 1 double sided delrin plastic punch.
AR-15, Issue:11, Page:086
Big Book Catalog, Issue:70, Page:084