This unique pen is make from two of the most popular rifle bullets in the US: The Springfield .30-06 and the Winchester .308. The .308 bullet is a 30 caliber round introduced to the US Army in 1906, replacing the earlier .30-03. It remained in service through World War I, World War II, the Koren War, and the Vietnam War. The .30-06 developed a strong following among big game hunters that continues today. The Winchester .308 round was introduced in 1952 to hunters as a big game round. It has a shorter case than the .30-06, which allows for smoother operation in bolt action rifles. The .308 is nearly identical to the NATO 7.62 x 51mm used by NATO armies beginning around 1954. The .308 is still used by military and law enforcement snipers, big game hunters, target shooters. Most pens are made from ‘once-fired’ rifle casings so there maybe minor nicks and dings. All pens come in a convenient gift box with white fuzzy lining and a signed certificate with above information. Ink refills are readily available at any office supply store selling Cross-style refills. The natural brass finish is protected with wax but will tarnish with daily use. If left alone, your pen will develop a rich patina. If you prefer a brighter finish, buff with a metal polish like Brasso. The copper plated fittings, while durable, will wear with daily use. In stock, ready to ship.