50cal Bullet Bic Pen adapter

Well, this is a remix from the 50 cal solid bullet with a 4mm hole in the middle to attach a Bic Pen tip and ink tube

Credit:
This thing is a remix is from a MrCrankyface thing.

His Page: http://www.thingiverse.com/MrCrankyface/about
The Thing: http://www.thingiverse.com/thing:1621494