Picture of office supplies grappling gun
Ever notice how secret agents and spies get all the cool gear? Now you can, too!
Make your own mini grappling hook out of everyday office and household supplies, then let let loose on a top secret mission from Her Majesty's Secret Service.

This grappling hook design was built from the new book Mini Weapons of Mass Destruction 2. This book has over 30 types of weapons and gadgets which can all easily be built with office or household supplies, most of which I had on hand already! I chose to build a personal favourite, the grappling gun. I recently got my hands on a copy of this book, you can read my review here.

Enough talk, let's make a mini grappling hook!

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Step 1: Tools + materials

Picture of tools + materials
  • masking tape
  • needle-nose pliers
  • hot glue
  • drill + bits / saw

  • floss container (full)
  • pencils x2
  • ballpoint pen (with removable back)
  • clothespin
  • cap from large marker
  • rubber band
  • pill/medicine bottle
  • paperclips

Step 2: Hooks

Picture of hooks
To make the grappling hook, start by straightening out 3 standard paperclips. Then, half each paperclip and wrap in masking tape. Using pliers, bend each wrapped paperclip into a hook-shape, refer to the picture for bend locations and degree.After all 3 paperclips are bend into hooks tape then to the ballpoint pen cap to secure them.

Step 3: Launch barrel

Picture of launch barrel
The launch barrel is made from the cap of a large marker. Ensure that the cap you use is a larger diameter than the ballpoint pen. Create an opening in the closed end of the marker cap by either using a wide bore drill bit or simply cutting the end off the cap. Use caution as this part can be tricky and fingers can get hurt if you're not careful.

Next, snip your rubber band and tape each end to the outside of the marker cap on opposite sides. Use plenty of tape to secure the rubber band in place. Lastly, wind a small amount of masking tape in the centre of the rubber band after it's been attached to the marker cap, this will act as the catch when you arm the grappling hook gun.

Step 4: Handle, stock and trigger

Picture of handle, stock and trigger
Disassemble the floss container and set the spool of floss aside. Close the floss container and tape down the two pencils side by side on the bottom of the floss container. This will form the handle of your grappling hook gun.

Using hot glue, stick a clothespin on top of the two pencils over the floss container. This clothespin will act as the trigger.

Finally, add the launch barrel previously assembled on top the taped-down pencils, on the opposite end from the handle with the rubber band draw facing the clothespin.

Step 5: Spool and line

Picture of spool and line
Using the spool of floss removed from floss container earlier, unwind about 6m (20') of floss and tape one end to the empty pill bottle. Wind the floss around the pill bottle loosely, starting at the cap end and ending at the bottom of the bottle leaving about 30cm (1') of floss loose. Using hot glue, glue the cap of the pill bottle onto the floss container. Ensure the pill bottle is placed appropriately to allow the spool of floss to be released without catching on the underside of the barrel.

Lastly, remove the ballpoint pen bottom and feed the loose end of the floss into the back of the pen and place the end cap back on, thereby sandwiching the floss into the back of the pen. If you're having trouble getting your floss to stay in the back of your pen try tying a few knots in the floss and then feeding the knots into the back of the pen.

Step 6: Fire away!

Picture of fire away!

You're all done, time to test out your awesome grappling hook!
Pull back the elastic band and feed the catch into the clothespin. Your grappling hook gun is now armed. Carefully feed the ballpoint pen into the barrel and place the end right up against the clothespin, depress the clothespin to fire your grappling hook!

I managed to get mine to fire about 6m (20') after a little tweaking of the rubber band. Substituting materials may even yield more impressive results. Make sure you point this away from people, pets, plants, or anything breakable.

Have fun!

Did you make your own Mini Grappling Hook based on the design shown here? Did you make another Mini Weapon of Mass Destruction? Share a picture of your results in the comments below and get a Pro Membership to Instructables!
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BenjaminC6 made it!2 months ago

so i didn't have all the items you listed, but i had some substitutes. instead of a pill bottle i have a marker cap. instead of the marker cap on the top i used the center of the spool of dental floss. it isn't too great, but i think if i tinker with it i could make it better. thanks for the design!

mikeasaurus (author)  BenjaminC62 months ago

Substitution is the name of the game! Glad you could make it work with the supplies you had. You should upload your videos to YouTube and share the results with other, too!

Thanks for sharing your version, enjoy the Pro Membership.

Warwolf 11 year ago
abkb1 year ago

this is sweet

Subdood1 year ago
You are going on my Awesome collection.
This is freakin beast! Best thing I've seen on Instructables for a while. (Yes, I've been creeping for five years or so without an account. X3)
This is the coolest thing on instructables
Made my own it probably doesn't shoot as far but it is more concealable
13, 11:20 PM.jpg13, 11:20 PM.jpg
Does anyone know where I can get a travel size plastic bottle 3.4 fl. oz. or smaller?
Teachers beware that's hilarious
peyton141 year ago
Love this mike! I made a penny/ change cannon since my friends started a penny war. I'll make an instruct able sooner or later.Keep up the good work!
mdman101 year ago
Nice. I made one using the Youtube video here:
Very cool.
raclaw741 year ago
The motor to wind it back up does work I've done it before
raclaw741 year ago
The motor to wind it back up does work I've done it before
I made one too.. I just lost it in our old house. My brother shoots it and makes the hook grab onto my shirt and he pulls me.. It's kinda annoying when my brother uses it.. But once I use it it becomes less annoying and more cool and spy-like.
totally one hindered and infintity percent awesome
adale1232 years ago
adale1232 years ago
how far can it shoot?
bsg682 years ago
Does the gun work cause I haven't tried it yet
Jacky P2 years ago
Thank you
Jacky P2 years ago
This is my gun
13, 3:04 PM.jpg
mikeasaurus (author)  Jacky P2 years ago
Nice looking grapple! How far does yours go?
For sharing your version I've awarded you a 3-month Pro Membership and a digital patch. Way to go!
Jacky P2 years ago
I made it and it didn't work!
mikeasaurus (author)  Jacky P2 years ago
What didn't work? Show us pictures!
emilolip2 years ago
Teachers beware!
kayra2 years ago
nice idea thanks you ı can't wait to make this
stop removing my gun or i am really gonna be pissed!! please mikeasaurus i am following you this gun is one of my favourites what else do u want me 2 do? for heaven's sake stop this!!!!
Photo on 13-12-12 at 8.36 AM.jpg
mikeasaurus (author)  Captainsparklez2 years ago
Sweet grappling hook. FOr sharing your version you get a 3-month Pro Membership and a digital patch!
Than mike
thank you very much!!! this has been my in one of my two favourites i mean,this gun is so cool!!!!!!!!!!!!¡ whoops upside down exclamation mark.........
popewill3 years ago
That, my friend, is pure epicness. One more reason to stall on my homework, consider me inspired. If you'll excuse me I'm going to search my house for supplies. I'll take pictures.
Done. Sorry for the bad quality, I took this picture with my webcam.
I also wasn't able to keep the hooks on long enough to taker the picture- whoops!
mikeasaurus (author)  popewill3 years ago
Thanks for sharing your version! You get a digital patch and a free 3-month Pro Membership. Enjoy!
where is my own digital patch and a free 3-month Pro Membership!!!! please give me one 2!! or else i will ******!!!@@###%%**&*&&__+(
Ahhh... stalling on homework.. Im doing it right now!
This is my grappling hook gun. I didn't have a wooden clothespin so I just release the elastic band by hand. I only have 2.7 m of floss though. But it shoots really good.
I made one too, but I didn't have a wooden clothespin so I had to use a plastic one. Now my hook don't shoot that far :(
Magh2os2 years ago
i added another barrel to mine so it shoots pencils as well as the grappling hook! i hid the string, too.
mikeasaurus (author)  Magh2os2 years ago
Awesome, thanks for sharing!
Where/how did you hide the string? I would be neat to show us how you made yours on your project page.

For posting your version of this project you've been awarded a 3-month Pro Membership and a digital patch!
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