The Packaged – AM-15 Bolt Carrier Group – .223 comes in our new retail packaging to better gift to others for Holidays, Birthdays, or Other Special Occasions! Also allows dealers to hang our products in your store! The AM-15 Bolt Carrier Group – .223 is Phosphate coated and Chrome Lined. The Carrier is made from 8620 steel, and the Bolt is made from 9310 steel and Phosphate coated, MPI Tested. The 223 Bolt and Bolt Carrier Assembly comes complete with Cam Pin, Firing Pin and Firing Pin Retainer.