Bolt-Action Pen with Side Clip

I liked the original design, but I wanted it to have the little pocket clip on the side like most pens, so I used Tinkercad to add one on. The top cap was also changed to have a bevel, and the parts have been split up into separate files.

EDIT: I have added a version with an improved clip and a more ergonomic grip design. This is labelled 'MKII' in the file. I ran out of black PLA, so printed it in 3DWarhorse Blue PLA and spray painted it gloss black.

Note: I have confirmed that this also works with Pentel EnerGel 0.5mm Needle Tip ballpoint refills.