The POW / MIA ( Prisoner of War / Missing in Action You are not Forgotten ) Paracord BearArms Bullet Bracelet™ Paired with .40 Caliber Shell Casings. The Best and Original Bullet Casing Jewelry on the Internet. A perfect bracelet for men and women. Show your support for the 2nd Amendment and our Military Armed Forces. Available in Brass or Nickel .40cal Casings.