The Machine Era Company makes some mighty fine pens, and this solid brass pen is perfect for your everyday carry. It's received a perfect 5/5 stars from 22 customers on Amazon, and is made entirely of a machined solid block of brass. No moving or plastic parts, it's just three pieces: the body, the ink cartridge, and the cap. Done.

Another unique aspect of this pen is the every day usage will accrue patina on the outside, giving a cool, used look.