Matthew Martin Tactical 400 Series Click Pen (Copper/Titanium)
This fine handcrafted Matthew Martin 400 Series Tactical Click Pen showcases a perfect balance of copper and 6Al4V Titanium. The well-balanced pen features a ball-bearing advancing push button click cap.
Comes with a Fisher Space Pen ink cartridge, but also accepts Parker refills.
To replace the ink cartridge, unscrew the tip counter-clockwise.