I know you’ve got one in/on your desk 
Here’s what I have so far. Working on keepin’ a clean mesh. I had a fun time working with the screw tool and making it work for me.
Materials are thrown on sloppily just for now.
Still tweaking materials a little bit, but I’m leaving the modeling as is (unless someone can point out something major.) Everything is accurate as far as I know other than the actual clicking mechanism which I did not model.
I’m not sure exactly how I want to make the orange colored cartridge top (shown below.) Perhaps I’ll try using SSS, and hopefully it will show through well.
The model shown now is with 2 subdivisions.
Edit: Added exploded view of the parts it currently consists of
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That’s really cool! Keep it up!
Nice modelling !
Probably gonna call it on this model for now. I bailed on a little bit of realism with the ink cartridge, but it’s not too bad. I may come back to it to try some DOF compositing or using it in a full scene.
Thanks for the comments!
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Who knew a pen could be that cool 
Good job, try to render in another engine, i want to see this look like a real pen.
