Michael's Fat Boy Gettysburg Guns 1863 - United Stainless SteelFire off Michaels Fatboy Gettysburg Collection! Each BP Gel pen barrel is machined from solid stainless steel bars into the shape of an 1850s handgun barrel used during the civil war and are very heavy like the guns themselves. This stainless steel edition is dated July 3, 1863, to commemorate the final day of the battle. Each pen also features a new super strong clip system. Limited to 188 BP Gel pen barrels.