inspired by INRITANCE MACHINING bolt action pen this is my version of this pen can be printed with pla 0.2 mm layer height and I used prusa slicer and uses a parker g2 refill a great project if you are new or just want to test tolerances of your printer
the main body has to be printed down words as shown in the photo with supports
have added the f3d file i am not a professional designer so the process may seem inefficient though would like to have remixes or better main body with grips and etc.
if you plunger is not smooth use a sand paper or tape to make the movement smooth
there are two screw hole in the plunger one screw is so that how much the refill sticks out and the other is the handle