Introduction: Ultimate K'nex Grenade- With Pin!

Picture of Ultimate K'nex  Grenade- With Pin!

a modification to a famous knex grenade by halo99. except without the shrapnel, and with 3 rubber bands.


16 red connectors
8 yellow connectors
2 white connectors
2 single slot connectors
a yellow rod
a grey spacer
a Y black connector


Step 1: The Pin

Picture of The Pin

This is the most simple thing in the world, second to rocket science of course.

Step 2: The Grenade

Picture of The Grenade

Make this. you don't really need instructions for this part, do you?
Why, just look at those pictures! OMG!

Oh yeah, don't forget da rubber bands.

Step 3: Putting It Together/ Blowing Up

Picture of Putting It Together/ Blowing Up

insert the yellow rod with the grey spacer in the bottom of the grenade and squeeze until the black connector on the other bit can go on sideways. Then to fire, put your hand in the position shown and flick the grey connector up. It will pop of and the yellow rod will drop through. Then throw!
It wont explode while the pin is in, actually it is very strong.

Blast radius: 5 meters.

Have fun destroying walls.


TheRoyalJester (author)2012-06-26

nice guitar dude

The cameraman (author)2012-05-26

I was building this and when I put the rubber band on the grenade imploded!

jmiester (author)2011-02-25

Dude i had to wrap my bands around twice, and when i tested the pin, it actually crushed in the middle a bit, so it was bent inward. however, when i reinserted the pin, it went back to normal. VERY POWERFUL WEAPON!

POB! (author)2009-10-13

 What guitars do you have?

willdel545 (author)POB!2011-02-18

I got an electric-acoustic.

legogunman (author)2009-08-15

this was so hard lol

jmm72 (author)legogunman2010-07-31

thats what she said

NatNoBrains (author)jmm722010-11-21


Derpancakes (author)2010-10-30

Love it!! Easy to build, awesome range and lots of shrapnel!! *****

MP 42 (author)2010-08-25

please layout your instructions

TheName (author)2010-03-15

 I looked at the knex website and apparently you can order knex parts individually. If I were to buy the parts for this grenade, it would cost me a grand total of $5.48 US currency. That's kinda expensive.

~Aeronous~ (author)TheName2010-05-05

 yup, which is why you ALWAYS buy in bulk

Mudbud (author)2010-01-30


Shadowstep12 (author)2010-01-19

is there anything inside it

afleticwork (author)2009-12-02

ok some one needs to make a knex gernade that has a timed delay

Pizzapie500 (author)afleticwork2010-01-15

Viccie did.

asteinhorn (author)2009-11-19

 built it, it completely rocks! I give it 9/10, -1 because sometimes it can be annoying to put together.  But it definitely works, doesn't use up too many pieces, and can be made in less then 5 minutes.  :D

halo99 (author)2009-10-12

lol nice mod to my grenade! nice job

~Z~ (author)2009-10-07

Im CoNfUsEd CaN yOu PoSt MoRe PiCs?

lewismarsh (author)2009-08-30

do you click em in other wise is so hard to keep em there??

The Jamalam (author)2008-08-23

i like the grenade, but what is the rollercoaster in the bg?

builder968 (author)The Jamalam2008-08-26

custom with screamin serpent parts. glad i could help!:)

milo ganson (author)builder9682009-07-09


builder968 (author)milo ganson2009-07-09


milo ganson (author)builder9682009-07-10

f U N

builder968 (author)The Jamalam2008-08-30

im building a jurrasic park knex rollercoaster!

Bartboy (author)builder9682008-09-02

Favourite movie

builder968 (author)Bartboy2008-09-24

lost worlds my favorite(the way us americans spell what you guys spell as favourite)

Bartboy (author)builder9682008-09-24

cool, will the roller coaster have like a track like the movie, or will it be a dinosaur themed mayham park

builder968 (author)Bartboy2008-10-02

well... i kinda let my second motor to power the t-rex into my sisters view. shes five, but shes wrecked lego models, knex stuff, and a nerf gun(at least dad got me another recon).wouldnt be a whole lot of fun to watch without it. its still in the design phase, too. oh, are you going to see the fourth one thats comin out soon???

Bartboy (author)builder9682008-10-02

you bet! It won't be very good though, what I liked about the first one was how there was the guy who hates kids with the two kids, andhis girlfriend was trying to save them, but they wrecked it in number 3, with his girlfriend marrying someone else.

The Jamalam (author)builder9682008-08-30


The Knexpert (author)2009-07-05

If it doesn't work you are doing something wrong... Thanks for the comments!

salemance25 (author)2009-07-01

This gernade rocks and hurts

Hiyadudez (author)2009-06-16

Is that a custom caoster from the scremin' serpents roller coaster set in the background?

osi (author)2009-06-02

lol, on every single website my user is the knexpert, except for this one.

olim (author)2009-05-31

When I tried to put on the y clip, the grenade kept falling apart.

spacecappa (author)2009-05-09

do the rubber bands have to be tight

rootbeer96 (author)2009-05-06

nice gernade dude

The Knexpert (author)2008-08-26

Millennium force.

grevious (author)The Knexpert2008-08-28

and what guitar? is it a gibson? or other?

DrWeird117 (author)grevious2009-01-23

Fender; either Strat or Telecaster.

grevious (author)DrWeird1172009-01-23

yeh i thought it looked like a strat, but it's hard to tell nowadays cause everyone copy's the body and head shape of the stratocaster.

1spartan95 (author)grevious2009-04-10

true that

DrWeird117 (author)grevious2009-01-24

LOL Yeah.

runthunter246 (author)2009-03-29

I built this thing its a beast !! 5* no doubt...please look at my grenade and comment what you think of it..I designed it myself and i have made a few mods to it so far but nothin worht posting

mwmrox123 (author)2009-03-12

awesome i built one. sweet design!!

mettaurlover (author)2009-02-18

i put an extra blue spacer on the pin, so that it would actually release. mine wouldn't, so i needed the extra force.

manman (author)2008-08-26

I built the grenade and it's not working

pietro pedro pete (author)manman2009-01-11

dont snap them together

About This Instructable




More by The Knexpert:Ultimate K'nex  Grenade- With Pin!TX2 Chain Gun (instructable coming soon!)
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