Introduction: Knex Pistol With Sear System

Picture of Knex Pistol With Sear System

this is a pretty powerful (20 feet with one #64 rubberband)knex pistol i made using the trigger and sear system in a similar way shown in my previous instructable. The red connectors on the back of the gun aren't in the pic but theyre in the instructions.


2 red
1 tan (rigid)
8 blue
15 white
26 green

4 white
2 blue
20 yellow
4 green
14 red
2 light grey
2 orange
11 dark grey clips
2 tan clips
2 special black arm things

3 #64 rubberbands (preferred)

Step 1: Body

Picture of Body

make 2 of these

Step 2: Trigger System

Picture of Trigger System

From left to right:

Trigger, Sear, and safety

Step 3: Handle

Picture of Handle

enter longer description for this step

Step 4: Trigger Reseter

Picture of Trigger Reseter

this is a simple piece that will insure the trigger goes back to its resting position with the addition of a rubberband (later in the instructable)

Step 5: Barrel

Picture of Barrel

sorry it's so bright pretty simple there's only two blue washers, one on either side, and there's six dark grey connectors 3 on either side.

Step 6: Firing Pin

Picture of Firing Pin


Step 7: Putting It All Together and Rubberband Attachment

Picture of Putting It All Together and Rubberband Attachment


For pic 2 and 3 you'll need to attach these pieces (pic 1)where shown dont attach the second dark grey connector yet (it's not letting me put image notes)

In pic 2 the safety is inserted into the (top) half of the gun in the white connector (to the left)in pic 4 put both sides together don't let anything fall out (this may be hard)

Pic 4 shows the rubberband that resets the trigger start from where shown and put the band on the red connectors in the front (you may need to to take the blue rods off by the trigger)

Pic 5,6,7 should be easy and show you where the rubberband for the sear is placed

Pics 8 and 9 show how the barrel is attached with the firing pin in the barrel as well

Finnally step 10 the rubberband on the firing pin (easy)

Step 8: Loading and Firing

to load the gun all you have to do is stick a rod down the front of the barrel (white or green works best) but anything you can fit will do. After you've loaded the gun pull the firing pin back, the bottom of the tan clip on the firingpin will catch the sear and lock in, now all you have to do is pull the trigger(may require a little force depending on the strngth of the firing pin rubberband)and watch it fly.


~Meme~ (author)2012-01-28

20FT powerful?

Mine uses less pieces and goes 70ftpls.

bballkidx (author)~Meme~2012-01-29

for just one band 20ft is okay

everyone here would love to see it post an instructable for it

~Meme~ (author)bballkidx2012-01-31


DreadFire3000 (author)2010-11-25

step 5 is way too hard!!!

it takes force

bbbbl (author)2011-03-27

whats a sear system

king of knex (author)2011-02-25

cool doos it fire knex rods?

moxx (author)2010-11-20

ok this gun is really cool looking

Agorion (author)2010-09-10

Should i make instructions?

the poodleo (author)2010-06-10

i am makiong two at a time. please help me

the poodleo (author)2010-06-10

yah it kind of annoys me that its this hard. i took two of the handle, and now im still having trouble.

nickster168 (author)2010-04-24

killed a rat with this!!!!

smegz (author)2010-04-14

Awesome gun. Added a couple of parts to make it look aesthetic(because I'm a perfectionist)!

taivo7796 (author)2010-01-23


taivo7796 (author)2010-01-23

This gun is awesome thx dude

Kevio bro (author)2007-06-16

step 5 broke my fingers lol

An Villain (author)Kevio bro2009-09-14

build the killerk pistol with black rods for the body lines, then you will be ready. also, i think it looks better with red connectors for this instead of yellow.

Yukondano2 (author)Kevio bro2009-08-19

I couldnt do it, i had to get my dad to force it in, even he had trouble! This thing is wicked. THE CAKE IS A LIE

smattman22 (author)Yukondano22009-08-22

but the square lives on!

Yukondano2 (author)2009-08-20

Quite an interesting weapon. I finished it well. Great design, Fires a decent enough distance.

Yukondano2 (author)2009-08-19

Im a bit lost because of that one picture that's really bright

gunmanx (author)2007-03-27

is this like a red rod or somtin

Yukondano2 (author)gunmanx2009-08-16

No, well, sorta Its the tan rod. I have one, But its as long as the red one.

altaria1993 (author)gunmanx2007-04-09


Namonos (author)2008-02-05

son of a ****!!! Im grounded for life for making a dent in our dry wall

MacLean (author)Namonos2009-05-05

wow, yours must be pretty good, mine sucked balls so I threw it at the ground and it exploded

_kira_ (author)MacLean2009-07-10

lol lol

thomaswatton (author)Namonos2008-10-30

Major LOL

DJ Radio (author)2009-06-20

Im gonna make a gun using your trigger system. 5*

liMePod (author)2008-12-16

this is an almost identical copy of this.

DJ Radio (author)liMePod2009-02-22

The person who made that gun also made this gun.

Storm950 (author)liMePod2008-12-16

Look who made 'this'.

pls (author)Storm9502008-12-16

Click the link.

Storm950 (author)pls2008-12-17

Me? Why?

pls (author)Storm9502008-12-17

it shows who made it.

Storm950 (author)pls2008-12-17

The same guy who made this. Which was the point I was trying to get at!

pls (author)Storm9502008-12-17


pls (author)liMePod2008-12-16

Looks like it huh.

BamfBacon187 (author)2007-03-31

what program did you use to draw this?

kennyboy 2 (author)BamfBacon1872008-08-13

uhhh dude it's called a C-A-M-E-R-A!!!!

thomaswatton (author)kennyboy 22008-10-30


kennyboy 2 (author)thomaswatton2008-10-30


knexman (author)BamfBacon1872008-06-15

mclad not sure on the spelling there is an instructable telling u all about it

robdun (author)2008-08-15

thanks for showing me on making a awesome knex weapon I will post pics about my mod later that dose 10 times more dammage.

Skreetsha (author)2008-08-14
kennyboy 2 (author)2008-08-13

hey this is a good gun i can make it shoot about thirty feet if you don't mind i'm going to make a rifle with this design because i've figured out a way to take the glichtes out when making it a rifle

pakman227 (author)2008-08-03

good gun, built it twice in the past 2 years

instructa-fan (author)2007-04-29

You're gonna go to jail and be good enoubh to where you order Knex out of that jail catalog, make this, and get a life sentence. Thumbs Up. Get-R-Done.Giggity Goo. Alll Riiiggghhht.

Cartuner55 (author)instructa-fan2007-06-29

stop saying that

apples!!!!! (author)Cartuner552008-07-04

lol i know its annoying

About This Instructable




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