AR15 Complete Bolt Assembly, Brand New • AR-15 Complete Bolt and Carrier • Bolt, Bolt Carrier and Firing Pin Ready to Drop Into the Rifle or Carbine Upper of your Choice • Staked Gas Key prevents Gas Leakage that leads to Short Stroking Specs: Made by Anderson Manufacturing Coating: Black Nitride Print Spec: made to Mil-spec drawing except no chrome lining. Carrier Material: 8620CD Bolt Material: 9310 This item cannot be shipped to California, Connecticut, Massachusetts, New Jersey, New York or the state of Washington. SKU: ANDBCG