Machine Era Bolt Field PenIt might take Pilot G2 refills, but make no mistake: Machine Era's Bolt Field Pen is a heritage quality instrument. It's fully machined from solid stock, using a Swiss type turning technique to create a two part body that's extremely accurate, secured tightly, and polished by hand. The bolt style opening action is quick, fluid, and fiddle worthy, and the pen is available in stainless steel or brass, finished off with a fully machined clip in either