Magic Metal M16 Assault Rifle Necklace Dog Tag Chain NB33 Gun Military AR15 Army Vintage Punk Pendant Fashion Jewelry Ships from the USA M16 Assault Rifle Necklace on Silver Dog Tag Chain. Brassy Gold Tone Pendant with Etched Gun Details Rifle Pendant Length: 2.5 inches. Total Length of Chain, Open From Clasp to Other End: 19.5 inches. Makes a perfect gift. Search Magic Metal Jewelry for more jewelry styles.