Nitecore NTP10 titanium tactical pen, CRX style :D
Always fancied this scribe though rather expensive, I got it for Christmas.
Nichia 219B powered by two SR 364 cells in the barrel of the pen operates by twisting the tungsten scribe/ striker.
Also drilled & insalled a nib so the cap screws on as opposed to just push/ pull on/ off.
Comes in a nice aluminium container, still working on that...
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Nichia 219B installation. I had to make up a small unit to fit in the end of the pen with the two button cells.
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I replaced the fisher ink cartridge with a smaller ordinary unit to make space for the acrylic rod and drilled in a steel nib to catch the threads of the cap.
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I made a Nichia 219C companion light and cases from carbon steel tubing