BA2 Bolt II VolcanoA sleek and elegant pen that writes beautifully, carries comfortably, and catches the eye. The 'Volcano' features our bolt action mechanism, inspired by bolt action rifles, which locks open and spring releases closed and yes, its a lot of fun to play with. Barrel is crafted from lava rock, turquoise, and bronze, and trim accents are all in stainless steel. Both the thumbstud (on the bolt action system) and the top of the pen are inlaid with white