How to Make a Flash Bang (Flash Grenade)

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About: Back 02/09/2012

this instructable will teach you how to make a quick and easy Flash Bang.
this was not my idea, i found it on youtube.
WARNING: while using a Flash Grenade, it is a very good idea to wear non-flammable gloves, and sunglasses.
DISCLAIMER: If you end up hurting yourself or others or setting something on fire, then I take no responsibility for it.

Step 1: Materials

What you need:
Two cigarette lighters, (a small bic one is fine)
the other one is to heat the flint up.
Pliers
Gloves (optional)
Sunglasses (optional)

Step 2: Destruction!

Pic 1: take the bic lighter and the pliers, then push the plier into the hole where the flame comes out, then pull of the metal covering.
It should look like the second picture.

Step 3: The Barrel

once again using the pliers, slowly pull the barrel off. there is a flint with a spring under it and the flint will shoot out, so be careful, because the flint is the most important part.

Step 4: The Flash Itself

Now the flint and the spring will be revealed.
Strech the spring so its relatively long, then wrap it around the flint.
CAUTION: make sure that the flint is very secure in the spring so that when you pull your arm back to throw it you don't end up setting your pants on fire.

Step 5: Using It!

If you chose to get some gloves or sunglasses, this is where you should put them on
It is also a good idea to decide where you are going to throw it, and make sure that nothing is highly flammable around the area you are going to throw it at.
-SAFETY WARNING TIP: I did this under adult supervision, and when you throw it, it would probably be safer not to pull your arm back past your ear, but to do a small underarm throw, and I would higly reccomend wearing entirely wool clothing.-
REMEMBER! IF YOU CATCH ON FIRE, STOP. DROP AND ROLL
And I also reccomend having a hose, or a bucket of water at hand.
Get the other lighter and hold the Flint Over the naked flame.
When it turns Red hot, then throw it!
(the one in the video wasn't so impressive because it cooled down a lot when I took pictures of it red hot)
FIN!

PS: I HAVE NO IDEA WHAT THE OUTCOME OF WHAT IS WRITTEN UNDER WILL BE.
IT IS POSSIBLE IT WILL BLOW UP IN YOUR HAND.
If you are this crazy, hold it over the flame till it is white hot, then shoot it out of a bb gun.
SERIOUSLY DON'T DO IT.

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    92 Discussions

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    DavidD477

    1 year ago

    This is not a flashbang it's just a piece of burning ferrocerium. You can buy six inch rods of the stuff online instead of having to pull apart lighters, I have a few ferro rods for lighting campfires. Lighting magnesium ribbon (again, cheap and easy to get online) would have the same effect.

    Flash powder (you might be able to get this online, check suppliers for antique photography equipment) will have a much better effect, for the bang all you need is black powder in a tightly sealed card tube.

    For an actual flashbang you will need:
    One coke or beer can, a food can is fine too
    Flash powder
    Black powder
    Card
    Duct tape
    Clear tape
    A few boxes of matches
    Safety fuse
    Cordage

    Assorted tools, a leatherman or swiss aemy knife will do.

    Using an awl punch holes in the can until it looks like it's been hit with birdshot.
    Cut the top off the can

    Make a tube out of the card, big enough to hold about 10-20g of black powder, leave the top open

    Cut about 5 seconds of safety fuse, cut six strands of 5 seconds of fuse

    Cut the match boxes apart so you have the strikers available

    Sandwich two matches in between two striker pads along with two strands of 5s safety fuse. Do this three times.

    Attach the cordage to the striker pads using duct tape

    Fill the tube with black powder and separate the fuse from each match striker into the black powder, secure toghtly with duct tape. The tighter it's sealed, the louder the bang.

    Reverse duct tape around the card tube so it becomes sticky and generously apply flash powder to it, secure the other three fuses and flash powder in place with clear tape.

    Insert into can so it is in the middle of the can, not at the edges

    Tape the top onto the can with the cordage coming out the hole that the ring pull makes

    Pulling sharply on the cordage strikes the matches (you use three in case one or two fail to ignite), which lights the fuses. You have about five seconds before it goes off.

    Flashbangs can cause severe burns and/or shrapnel injuries if handled/made incorrectly. Check local law before making this. Don't attempt to make your own fuse.

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    Ysbeer4

    2 years ago

    So does it explode on contact?

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    candaattheshore

    2 years ago

    Sounds great to scare away black bears at my house

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    JeffS113

    2 years ago

    thats a flint bomb not flash bang

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    Doc Penguin

    3 years ago

    im gonna get 5 flints from lighters

    İll post a vid when im done.

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    jlee170

    5 years ago on Introduction

    That's simple, all right, but it works more like a firecracker. I was looking for something more explosive. Lame in my way, cool in others. Nice firecracker, bro.

    1 reply
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    Skrubrekerjlee170

    Reply 3 years ago

    Well it isn't supposed to be an explosion it is supposed to be like a flash...

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    5784codyclark

    3 years ago on Step 5

    I made it and it work like a charm thumbs up dude

    :O sry that was my other acount i'm Visper123, that wasn't meant to be related to anything which was spoken about here.

    Will the real Visper stand up please, of cause you are Visper, thats your ID, should not GoCrazy be saying he is Visper?

    Whatever, I am going crazy myself with that apparent paradox. . See you later.

    Multiple personalities then? :-) What next? Should I look up your projects under GoCrazy?

    Is there a 3rd personality? Could it be its just you and me on Instructables?