The rifle casings will have a natural patina over time. The nickel plated brass should be cleaned with a non corrosive metal polish. To replace the ink, twist off the top of the pen and unscrew the pen cartridge. The pen cartridge is a standard cross type refill.
The item "BULLET PEN 308 CALIBER RIFLE CARTRIDGE NICKEL PLATED WITH COPPER TIP AND CLIP" is in sale since Sunday, April 20, 2014. This item is in the category "Collectibles\Pens & Writing Instruments\Pens\Ballpoint Pens\Handmade Pens". The seller is "scout214350" and is located in Bear Creek, North Carolina. This item can be shipped to United States, Canada, Australia, Japan, China, South Korea, Indonesia, Taiwan, South africa, Thailand, Hong Kong, Bahamas, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Malaysia, Brazil, Colombia, Panama, Jamaica, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Viet nam, Uruguay.