Sons Of Liberty Gun Works 556nato, 55 Grain, Full Metal Jacket, 50 Round Box 556-55fmj-1000Model: 556Product Type: Full Metal JacketUnits per Box: 50Units per Case: 1000Caliber: 556NATOAmmunition cannot be shipped to a P.O. Box, please use a physical address during checkout. For restricted state buyers (CT, IL, NJ), please email a copy of your state's credentials, and a photo ID along your order number to [email protected] within 5 business days to avoid cancellation and refunding your order. For California, Massachusetts and New York buyers, please have your dealer email us a copy of their FFL or Ammo Vendor License along with your order number to [email protected] within 5 business days to avoid cancellation and refunding your order. Your order will not ship without us receiving this information. Thank you for your cooperation