Introduction: Knex Mortar

Picture of Knex Mortar

Okay, I finally got an in structable posted. It only took me a year and 10 prototypes to get the design right. But I'm sure it will please you. It is my first instructable so I want alot of comments. This is the first scale Morter on this sight. so lets get started.

Step 1: First Base

Picture of First Base

this is the base that holds the morter. Just follow the pictures.

Step 2: Second Base

Picture of Second Base

Give a general description of the Stepthis is the stand that holds up the barrel. Again, just follow the photos.

Step 3: End of Barrel

Picture of End of Barrel

this shows you how to build the end of barrel. Follow pics.

Step 4: Mechanism End of the Barrel

Picture of Mechanism End of the Barrel

This is the end that is attached to the base. these steps might be a little confusing but you should get it follow pics.

Step 5: Sight(optional)

Picture of Sight(optional)

this is the sight pretty self-explanitory. you don't have to build it but it kind of works.

Step 6: Rubberband Placement

Picture of Rubberband Placement

this is where the rubberbands are placed.

Step 7: Connections

Picture of Connections

this is the step that connects everything. Attaching the bottom barrel to the base is kind of hard.

Step 8: Bullet

Picture of Bullet

build bullet.

Step 9: Loading the Morter

Picture of Loading the Morter

Give a general description of the Stepthis is how you load the mortar.

Step 10: Firing

just pull on the red connecter attached to the blue rod and it fires.

Step 11: You Are DONE!!!!!!

Picture of You Are DONE!!!!!!

you are now done with the mortar go shoot it outdoors! any questions? just leave comment and I'll get to you as fast as I can.


NJL4JC (author)2012-04-30

very cool.

stryker3 (author)2010-12-20

I built it, but it went 10 feet. I think I did it wrong.

stryker3 (author)2010-12-20

you could've used less pieces on the base. I made my own base that uses less pieces and still works great.

jack691 (author)2010-11-18

this is great for knex wars and i have bulit it and got it to go 55 feet high and 80 feet in distance.

miles510 (author)2010-09-08

i dont actualy see hw to put te band on

DontShoot262 (author)2010-07-18

how far does it shoot??????

TheDunkis (author)2008-10-02

Pretty cool. Too bad it only uses small rod ammo instead of a bigger caliber. It would be great if someone made a mortar that could launcher either IaC's War Bombs or my X8D Suplody for a devastating effect. This is still really good though.

DontShoot262 (author)TheDunkis2010-06-27

I'll try.

im gonna make a knex mortar and put my very own knex grenades as ammo so it can have more of a devastating effect.

I_am_Canadian (author)TheDunkis2008-10-02

Suplody? LOL And Im actually working on top of a grenade launcher. On top of micro cannon, full auto, pistol, and sidearm...

An Villain (author)I_am_Canadian2009-06-09


suplody? I need to remember that for a joke. lol.

TheDunkis (author)I_am_Canadian2008-10-02

Super-Splody. Make sense? Well I look forward to it. It would be a great war addition.

I_am_Canadian (author)TheDunkis2008-10-02

Lol yeah

An Villain (author)TheDunkis2009-05-21

i made a mortar that fires shoes.

DrWeird117 (author)TheDunkis2009-01-13

I modded this to fire I_A_C's ammo, plus, you drop it down, and it automatically fires, like the real one.

thomaswatton (author)TheDunkis2009-01-05

defo on iac's war bombs there awsome

pls (author)2008-11-11

a year to perfect it?!

jaghead 96 (author)pls2008-11-14


pls (author)jaghead 962008-11-14

did you work on it every day lol?

jaghead 96 (author)pls2008-11-23

na I worked on it every other day

Mr Cheeseo (author)jaghead 962009-10-01

How far does it go

pls (author)jaghead 962008-11-23

thats still alot lol

dumdum24 (author)2009-07-28

i dont know should i build this

master of knex (author)2009-07-16

if says to use it outside it must be pretty powerful

necromonger (author)2009-05-31

do i have to cut of that orange connector

fib3roptix (author)2009-04-11

Is it possible to make a stripped down version of this knex mortar? Like a Bazooka

stormz76 (author)2009-03-27

I cant do the blue thing that connects to the yellows how the heck did u do it ?!!?!?!?!?!?!?!

mega man 4bm (author)2009-02-22

Mind if i post a sniper/cannon this with this design cause it has insane power and pain (and its silent until it hits its target!!).

jaghead 96 (author)mega man 4bm2009-02-26

sure as long as you mention that the Idea came from me

thomaswatton (author)2009-01-05

how far can it shoot

Abominatus (author)2008-11-15

tis very good,so well done, but the trigger is wrong. the way a mortar works is when you drop the ammo into the tube, the impact sets-off a percusion cap connected to a charge. the charge blows up and sends the ammo flying. when I was making my mortar I tried to make it so to fire I had to pull back the bands to the trigger. I would the drop the ammo in, releasing the trigger, sending the ammo flying. I failed to do this... you should give it a go.

sniper crazy (author)Abominatus2008-11-16

it is very difficult to have a self triggered knex knex like that u need an extremely large barrel and u might need to use something else as the ammo besides knex

Abominatus (author)sniper crazy2008-11-19

no, knex ammo would do... all you need to do is have te trigger release inside the barrrel so when the ammo is dropped in, the trigger is released.

it the mortar would consume atleast 900 or more peices that not a lot of people have


jaghead 96 (author)2008-10-19

It shoots about 50ft. high and 70ft. distance.

dombeef (author)jaghead 962008-11-07

reply not just post a comment

jaghead 96 (author)2008-10-25

thanks a lot. thats pretty sweet that you faved it. Especially because this is my first instructable. And sorry about using your barrel without crediting you in the introduction of my rifle.

Skreetsha (author)2008-10-25

Sweet! Faved and 5!

100engledude (author)2008-10-19

how far does it shoot?

Bartboy (author)2008-10-01

And your second.

apples!!!!! (author)Bartboy2008-10-16


jaghead 96 (author)2008-10-03

Hey thanks guys for actually viewing my first instructable. Just thanks alot.

MI6 (author)2008-10-02

Looks great! You've certainly spent some time on it keep persevering. Very realistic and powerful looking, and i give it a 4.5... no, a 5*

Oblivitus (author)2008-10-01

You made a mistake on the step 9 description.

necropolian (author)2008-10-01

pretty cool, my rate is, let's see, 4.5.

Bam82693 (author)2008-09-30

Your welcome for your first comment.

About This Instructable




Bio: i like potatooooooooooooooooos.
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