Introduction: Tactical Space Pen - EDC

About: I enjoy everything

I am an imprisoned writing instrument addict.

I wanted to share my version of combining a nice stainless steel pen barrel with the fantastic space pen refill ink cartridge.
Even-though this is not my invention - it is a new idea to me, which I had to create.

The everyday carry world aka EDC - which I am also addicted to – reveal the ideas of maximizing usefulness of what we carry.

The Tactical Space Pen is an item that fits my bill for a EDC pen.

The marbles pictured are from my childhood - another passion.

Step 1: Items Needed and Tools

Items to combine into one


Zebra F-701 Ball point pen, fine point 0.7mm

Heavy-duty stainless steel barrel

Easy to hold knurled grip

Clicking mechanism

Retractable cartridge – not going to be used


Fisher space pen cartridge – Medium point black ink

It can write in all conditions


Curved dental pick - other sharp objects could be used

Step 2: Open Barrel and Remove Internal Items

Open Barrel and remove internal items

I twisted (unthreaded) the tip of the barrel.

I took out the retractable cartridge (put it in the drawer for possible future use)

I saved the spring to reuse for this project.

Using the dental pick, I pulled the plastic plug out of the tip.

Please note: It does not take a great deal of force to pull the plastic plug out. I suggest that you reach as far down in to the tip with the pick.

Also note: I believe other styles of picks could work. I used what I had available.

Step 3: Replace Components

Replace components

Using the existing spring, I reversed the dis-assembly process - but using the space pen ink cartridge.

Side note: the space pen has a plastic spacer in the packaging. This plastic spacer is not needed for this application.

Step 4: Finished Tactical Space Pen

This was a great little project.

I have several requests for additional pens.

Thank you for viewing my Instructable