How to Make a Concealable Pen Gun

This tutorial is more advanced than the others, being that it uses 2 springs, fishing line, and some parts you may not have.  But don't worry, I have listed substitutes.  If you don't mind spending some money, I recommend buying this spring set if you don't have Amazon Prime or this set if you do have Amazon Prime.  They are around $8-10 but they give you 200 springs, which goes a long way for projects, no pun intended.  I have a box of springs similar to these and they have proven to be very useful.  If you don't need the extra 198 springs, you can give them to your dad.  I'm sure he'll be happy.  Anyway, back to the tutorial.

Tools of the Trade:
1 Pen
2 3/16" x 1 7/16" springs
1 old-fashioned ballpoint pen refill
1 paperclip, any size
Pliers

Alternate Tools
-If you don't have springs, take a bunch of springs from various "clicking" pens.  But make sure that they are the same size, since if you pull back, a smaller spring might get jammed in a larger spring.
-If you don't have fishing line, use durable string.  But the string should be thin and easy to thread through something.  If you don't even know what fishing line is, just look here.
-If you don't have a ballpoint pen refill, find another object similar in shape and size.  But it doesn't have to even be circular.  For example, it could be an M-shaped paperclip that would hold down both sides of the spring.  But your replacement criteria should be this:
-Can I attach it to the fishing line?
-Does it fit inside the pen?
-Can it hold down the spring when pulled?
Then again, you should try to get the ink cartridge, as it is the easiest to thread.  


Step 1: Disassemble Pen

Step 2: Threading the Refill
This step requires the black part of the pen refill.  Take off the black part of the refill.

 

Next, take a length of fishing line and create a bend in it.

Take the creased part and put it through the non-threaded end of the refill

 

Step 3: Add Paperclip

Using pliers, bend and cut the paperclip into a small V- shape.

Take the paperclip and hook it to the loop that comes out of the refill.

Pull back on the fishing line so that the paperclip is firmly wedged into the refill.

Step 4: Add Springs

Take the other end of the fishing line and put two springs through the line.

Next add the end of the pen and tie a knot in the fishing line.  Hot glue the knot if necessary.

Put this section into the front of the pen, where the cap should go.

Complete! Take anything, such as a wad of paper and put it into the open end.  Pull back on the string, and let go.  If you want to cover the open end up, take the cover off of another pen.