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How to make a 'bolt action' BB launcher out of a mechanical pencil

Picture of How to make a 'bolt action' BB launcher out of a mechanical pencil
bbs.JPG
Top Cocked Empty.JPG
Have you ever needed a BB launcher that is durable, compact, dependable, and effective but always get stuck with bad designs? No more! This BB launcher is cheap and easy to make and easy to maintain. Will cost only about $1!!
BECOME THE CLASSROOM DISTRACTION!
Note: Please, at each step, look at the pictures and notes to save yourself A LOT of frustration

- Please comment on the quality of this Instructable. It's my first and I want to know what look out for in the future
-Sunscribe, rate 5 stars, and comment if you have any questions

-Depending on how well this instructable does in the contest and how well it gets rated, I might make another guide on how to customize your gun
   -Attachments, grips, clips, you name it
   - just subscribe, and vote


 
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Step 1: Assemble Materials

You will need:

-One BIC mechanical pencil

-One 'clicky' ballpoint pen

-A small piece of plastic (like an old school ID)

-One ¼” long, 2 mm diameter metal cylinder (see picture) I get mine from pens, cap guns, and nails

-Scissors

-Razor Blade

-Fast drying super glue (optional but suggested)

Step 2: Strip Pencil

Picture of Strip Pencil
lead restrictor seperate and on pencil.JPG
eraser and lead.JPG
pocket clip.JPG
Fully Stripped Barrel.JPG
-Remove and throw away the tip by pulling it off

-Remove black lead restrictor by cutting it with scissors (see picture)

-Remove spring and set aside

-Remove eraser and lead and throw away

-Using scissors, remove the pocket clip, careful not to snap pencil, so it looks like the one in the picture

Step 3: Assemble Firing Pin and Bolt

-Take inside part (the part you click on the mechanical pencil) and cut about one cm below any one of the holes originally from the pencil

-Using the razor blade, widen the pre-cut hole nearest to the end you cut so the metal cylinder can fit snugly
  -Apply glue around bolt (optional but suggested)

-Once the cylinder (bolt) is in place, use the razor blade to widen the hole on the side nearest the bolt so that a spring can fit snugly in (get the spring from either mechanical pencil or clicky pen, whichever works better.) You should find a spring that fits with the pen part so that it won't fall out
  -If no such spring exist, you can just CAREFULLY glue the pen to the spring

-Dismantle the clicky pen and take the pen part (the part with ink in it) and cut off about 2-3cm of the back part so there's no ink in the bit you cutoff (this is the firing pin)

-Take this newly cut piece and stick it inside the spring, glue if the firing pin is too loose in the spring


Step 4: Barrel/Bolt Assembly Housing

-Using the scissors, cut off the uneven end bit.

-Widen the newly cut hole so that a BB can roll down the housing smoothly.
  -If the test BB doesn't go down smoothly, widen hole or blow out any obstructions (plastic shavings).

-Hold the bolt assembly parallel to the remaining part of the mechanical pencil.

-Mark on the housing where the bolt is.

-Using the razor blade cut from the TOP (the end you didn't cut off) of the clear housing piece to where you marked so that you make a track for the bolt. It is imperative that you cut at this end

-At the end of bolt track, cut out a little notch on the right side the size of your bolt piece.

-Insert the bolt and firing pin assembly into housing.

Step 5: Trigger Mechinism

Picture of Trigger Mechinism
Trigger Compared to Quarter.JPG
Inserted Trigger.JPG
Barrel of the Gun.JPG
-About .5cm from the end of the firing pin make a slot on the UNDERSIDE a little less wide than the width of the entire of the housing using the razor blade
-Cut a piece from your plastic the size shown in the picture below. Make sure it fits in the slot you made
-Insert newly cut plastic piece into designated hole so that it obstructs the path of the firing pin

Step 6: Test Fire

-Put bolt and firing pin assembly into housing with trigger in place

-Insert BB one of two ways
   -One- Weak configuration. Cock gun with no BB at first, then roll BB down the end
  so it goes from left to right: BB, trigger, firing pin
  The advantages of this configuration is that it doesn't put as much stress on the
  trigger therefore making it last longer.
  The disadvantages are that you can't aim downward and the BB doesn't go as far
  -Two- Power configuration. Open bolt then insert BB directly in front of firing pin. It
  should go from left to right: trigger, BB, firing pin.
  The advantages to this configuration is that you can aim downward without the BB
   falling out and that it shoots farther

-When desired configuration is set, pull trigger downward. The BB should fire. Enjoy!


Billman1019 months ago
awesome , pure awesomeness
Blechmen4 years ago
is this even worth it because cutting the slit is not easy
stop spamming, nobody cares.
ishmal1103 (author)  Blechmen4 years ago
im not sure what you mean
if you mean the small trigger slit, you need that because otherwise, it won't fire
its like taking a trigger out of a gun, the slit is where the trigger goes

if you mean the bolt track, you NEED that, thats the whole unique point of this design, the bolt is where all the mechanisms are housed
Blechmen4 years ago
ya the bolt track
ishmal1103 (author)  Blechmen4 years ago
it is ESSENTIAL
just make sure you dont cut your fingers (gloves?)
and use a sharp razor blade
Blechmen4 years ago
define lead restrictore
ishmal1103 (author)  Blechmen4 years ago
its the black thing in the picture
if you take the tip off the pencil, you get the black thing with a hole in it, led coming out of said hole
look at the picture
is this nick
ishmal1103 (author)  tylerhuntress4 years ago
yo whats up? how'd you know?
Bob9394 years ago
if you use a meccano screw you dont need to cut the hole thing out
ishmal1103 (author)  Bob9394 years ago
im not sure i know what you mean, explain.
what is a meccano screw?
Pointsman194 years ago
Great Job and other encouraging words of encouragement
Kaiven4 years ago
It is interesting how you almost reversed the design of regular pen guns. I would suggest using a more massive spring and maybe incorporate a slightly stronger trigger.
ishmal1103 (author)  Kaiven4 years ago
I thought about this while designing it. I went more for simplicity becasue chances are, people won't be able to obtain spring much stronger than this one. The same goes for a trigger. I've been looking around and haven't found much that's stronger
pretty cool!!
salomon19964 years ago
This is realy cool! cant wait to try it out! GOOD JOB! :D
ishmal1103 (author)  salomon19964 years ago
thanks dude!
your welcome!