Amazon.com : Bic 830864 BiC Cristal Original 1.0 mm Ball Pen Pack of 10,Black Packaging may Vary : Office Products
File:Gram (pen cap on scale).jpg - Wikimedia Commons
First real mod. BIC pen and caps w/pilot G-2 grips. I want to put something (like a marble?) in the grips to add weight but idk what to put there. : r/penspinning