This is a customizable pen, adjustable to accommodate common refills. Choose a length and pen diameter that are comfortable for you! The Lockheed Martin logo can be added to the cap.
Printer Brand: Other
Printer Model: Various
Rafts: Doesn't Matter
Resolution: 0.2 mm or less
Infill: 35% or more
Print at fairly slow speed (I did 30 mm/sec) for accuracy of fit. A brim might be advisable for better adhesion. Tested on Ultimaker, Felix, Printrbot, Makerbot, Type A printers. STL included is for printers with 0.4 mm diameter nozzle size; use the customizer to adjust if your printer has a different nozzle size.
May need to scrape out the inside of the barrel or cap at the print surface to ensure a smooth fit. Depending on printer accuracy, may need to ream out tip hole; test by inserting refill tip into barrel tip before trying to insert refill into the other end of the barrel.
This was done using OpenSCAD based on an initial design by Robert Bunting of Lockheed Martin Space Systems. It is intended as an example for an upcoming Lockheed Martin internal design competition centered on office accessories.