Whether you’re on the hunt for a writing instrument, a new tactical device, or a piece of history—this bolt action pen offers it all. GPCA’s GP 1945 PRO Bolt Action Pen offers a beautiful design commemorating the end of World War II. Designed to be lightweight, the pen is built from aluminum, but packs a punch with its tungsten glass breaking tip. Not only can you use the tungsten glass breaking tip to escape an emergency situation, but you’ll also be able to call for help using the pen’s built-in 100 decibel multi-tone emergency whistle. Need to measure something on the fly? Try out the aluminum pen’s diamond knurling along the grip, which provides a measuring reference for metric and imperial marks at 10mm and one inch respectively.