NorthWest Territorial Mint NWTM 1 Troy Ounce. 999 Fine Silver 5.56 x 45mm /. Offered here is an original NorthWest Territorial Mint NWTM cartridge-shaped silver bullion collectible containing 1 full troy ounce of. This piece was produced in the dimensions and appearance of a 5.56 x 45mm /. 223 Remington cartridge and makes an unusual addition to a silver bullion, precious metals, military-themed, or NWTM collection. 999 Fine Silver. Silver Content: 1 Troy Ounce. Weight: 480 grains / 31.103 grams. Style: 5.56 x 45mm /. 223 cartridge-shaped bullion. Approximate Overall Length: 2.290 inches / 58.17 mm. Approximate Base Diameter: 0.390 inches / 9.91 mm. Base Marking: “NWTM 1 oz 999 AG”. IMPORTANT: This item is a solid silver bullion collectible. It is inert and is NOT live ammunition. NorthWest Territorial Mint silver pieces have become increasingly collectible, particularly unusual shaped bullion such as these cartridge designs. You are purchasing ONE 1-troy-ounce silver bullion piece. Four are currently available. Please review all photographs carefully for the exact condition. The NWTM, 1 oz, and. 999 AG markings are clearly stamped into the base. A great piece for. Silver bullion collectors NorthWest Territorial Mint collectors Military-themed collections Precious-metal collectors Unique gifts or display pieces. Again, this is a solid. 999 fine silver bullion collectible and NOT functional ammunition.