Introduction: K'nex Breaking Sniper: the Rucksack Rifle

Picture of K'nex Breaking Sniper: the Rucksack Rifle
If you want the stronger and more powerful version then head here:

The not-so-long-awaited Breaking Sniper is here!
Promo video:

- incredible range (Axiys Zx said he got 200ft)
- Fits into any rucksack
- Takes less than 20 seconds to assemble and under 10 with practice!
- Very reliable trigger
- Due to it's mech this can also be used as a pointlessly large RBG!
- No scope
- Not what I'd call weak but it's not as strong as a normal k'nex sniper. The barrel will come off if bent sideways (that's SIDEWAYS).
- The butt is a bit skeletal even though it's quite strong.
This gun contains NO BROKEN/DECAPITATED pieces or any "special" pieces such as y-connectors, hinges or ball joints. The only "special" pieces are 2 blue spacers but they are optional anyway.

Image 2 is without the 3d connectors i.e will not break but is more sturdy.

Step 1: Parts List

Have enough parts?
Let's see:

Green Rod: N/A (too many to count!)
Blue Rod: 43
Yellow Rod: 5
Black Rod (or grey, but black looks cooler): 2
White Rod: 145
Red Rod: 2

Yellow: 102
Orange: 53
Dark Grey: 20
Light Grey: 11
Red: 12
Green: 13
White: 25
Blue: 8
Purple: 14

Blue spacer: 2 (optional)

Step 2: The Main Body

Picture of The Main Body

This looks like an oversized pistol and is the heart of the gun. Very easy to make.

Step 3: Handle

Picture of Handle

There is a large number of pieces here so if you wan't to save some parts (so you can build my upcoming assault pistol!) then this is the step to do that!

Before you start moaning I my computer didn't recognise the other pictures of the handle so this is the only one I have. I have annotated the numbers and order needed though.

Step 4: Trigger

Picture of Trigger


Step 5: Stock, Butt and Clips

Picture of Stock, Butt and Clips

1, 2, 3 are the butt. I didn't take it apart because it is very very simple. The same applies to the stock.

4, 5, 6 are the stock from many angles!

In the penultimate picture make 2

I'll tell you how to attach them all later!

Step 6: Barrel

Picture of Barrel

For this step if you're rucksack/bag is quite small then make the barrel small enough to fit in. Don't necessarily make it as big as mine!

Picture 3 needs to be built 3 times
Picture 6 is a view from the side

There is a stand attachment and a basic stand (me and bipods don't get on, but if you want one apparently Oblivitus has a good one for his assault pistol).
Last picture is a view down the barrel, in case any of the pictures confuses you.

Step 7: Strengthening Bracket

Picture of Strengthening Bracket

This looks nicer with black rods in my opinion.

Step 8: Put It All Together!

Picture of Put It All Together!

Picture 1 is for the body/handle/stock attachments.
Picture 2 is for the firing mech, but you can use number one for that too.
Picture 3 shows how everything clips together! It also shows how to add the butt but this is easy.

To attach everything together:
The barrel simply clicks on
The stock clicks on then fasten by clipping the red connectors together
Once everything is done add the bracket to hold everything together, but make sure the end with the yellow connectors is clipped so they are behind the trigger mech.

Step 9: Loading

Picture of Loading

1) Possible Ammo
2) Possible Ammo head
3) SRv2 bullets work but you must add the dark grey connector on the other end
4) How to load. You MUST load the bullets this way as the bolt will be flung upwards rather than down. These bullets are for high ranges. If you want accuracy then the SRv2 and the 2nd bullet option are for you. Although all slingshots aren't as good as tube and stick guns (this includes Gorkem's sniper and Mepain's Loser Rifle and the like)
The picture of the SRv2 bullet is owned by KillerK.

Step 10: What to Expect From Lowney

Picture of What to Expect From Lowney

- Slide action Slingshot
-Check out my Fact robot forum, click my name!
- RBG (prolly no post though)


maxxion (author)2013-01-14

Why do all the awesome things take twice as many pieces as I have? x.x

Lowney (author)maxxion2013-01-15

More complex mechanisms, bigger structures to maximise power etc. I suppose :P Thanks for the compliment I guess though. If you're building on a budget TheDunkis has some good stuff that doesn't require too many parts, and KillerK's BR8 or BR18 models are fairly minimalist too (if you discount the stocks and are brutal with the amount of barrel structure you remove)

maxxion (author)Lowney2013-01-15

Lol, that's true I suppose. One of these days I'mma jsut ahve to cave and go buy more, there's so many amazing things like this I wanna build (This is probably the best sniper I've seen so far).

Lowney (author)maxxion2013-01-16

Yeah, I'm not a huge fan of manipulating pieces, that's why none of my stuff uses them, the exception being the AA Sniper, they just kind of feel "cheaty", but I appreciate that for some guns there is no other option. These aren't mine, but they are all really powerful and use very few pieces (if it's a sniper you want):

They're all pretty old now, but I've been out-of-touch with the latest happenings in the k'nex community and they're still really good if it's budgeting that you want!
And I guess the unbreakable sniper from my page :)

maxxion (author)Lowney2013-01-16

Once I get my income back, I think I'll jsut buy some more and build yours. Mostly it's a Looks thing, and yours has one of the best styles on the site. :) plus, your first picture make sit look like it has optional attachments, which I LOVE.

Lowney (author)maxxion2013-01-18

Fair enough, thanks for the support! :)

Lowney (author)maxxion2013-01-18

Fair enough, thanks for the support! :)

Lowney (author)maxxion2013-01-16

Thanks, that means a lot :) I personally prefer the unbreakable version (I published a separate instructable), and if you want a no-compromises sniper then I would suggest the SRv2 instructable also found on my user uses a LOT of pieces though!

maxxion (author)Lowney2013-01-16

And once I do build this, I already have a couple mod ideas (like a different bipod stand).

maxxion (author)Lowney2013-01-15

And the other lovely thing about yours in didn't break any pieces to do it. I look at people's guns like Oblivitus and the like, and they all end up breaking and warping pieces. Kudos to you for avoiding that little pitfall.

mrmuffin (author)2012-06-04

hey lowny i re built this and got it to shoot 150 ft!!!!!!!!!!!!!!!!!! my neighboors were rly mad lol but it finally paid off

Lowney (author)2012-05-27

Sorry you didn't like it. You must have built it wrong for the mechanism not to work, because it worked fine for me, as demonstrated in the video. And are you aware that you have left caps lock on? And what's $ HRS? And there's an apostrophe in "Didn't" too.

mrmuffin (author)Lowney2012-06-03

sry i was just mad that day bc of my family and other stuff and i found out the prob lol i was putting the rubber bands on the trigger rofl i built it half way so it was like a broken shotgun so i never red how to load sry bout that

dansdoc (author)2012-02-05

could you look at my instructable????
please tell me if its any good!

pwnful (author)2011-07-15


Lowney (author)pwnful2011-07-16

lol, add the yellow connectors to the blue rods first, then join them all up with the white's easier ;)

dansdoc (author)Lowney2012-02-05


legomaster50 (author)2011-04-16

hew lowney i built this and its amazing do you mind if i mod the stand and stock oh yeah i was wondering if its normal for it to somtimes shoot backwards or to the side

Lowney (author)legomaster502011-04-16

Sure, I don't mind you modding my stuff and posting it :) And no, I've never had mine shoot backwards, how is that even possible? Did you divide by zero? ;)

legomaster50 (author)Lowney2011-04-22

thnx i made a better bipod it really only slings it backwards when i dont use the bipod but when im not shooting it standing up it shoots perfect. what do u mean by did u divide by zero? oh yeah i made the stock stronger.

Lowney (author)legomaster502011-04-23

lol dividing by zero is impossible, there's a meme where when something physically impossible happens, you say "who divided by zero?" because it's an impossibility. Google image search "divide by zero" or something so you can see :P

legomaster50 (author)Lowney2011-04-24

lol im so stupid i didnt know that and i took it apart already to make i_am_canadians heavy cannon v5

Lowney (author)legomaster502011-04-25

It's not stupid to not know an internet meme lol :P And cool hope that goes well, it would hurt like hell if THAT fired backwards too ;)

legomaster50 (author)Lowney2011-04-25

yea im finished with it it wont backfire at least i hope not its awsome shoots as far as he says:)

epicbobman52 (author)2011-03-21

do you mind if i use this trigger mech for a sniper i was thinking ov bulding(ill give u ful credit for the trigger!) but if there any better trigger mechs that u know of than thisone plzz tell me ( i have the whole gun planed out exepet for the trigger)

Lowney (author)epicbobman522011-03-21

Sure go ahead :)
Try the SRv2 mech first, it's much more difficult but the pay off is well worth it, the SRv2 is the first instructable I posted, visit my profile and either click "Most viewed" or "Highest rated" and it'll appear as one of the first ones lol

epicbobman52 (author)Lowney2011-03-23

thx i built it with a modded verson of the srv2 mech, but whenever i fire it the yellow rod disconects from the place were the bullet clips on

Lowney (author)epicbobman522011-03-23

That isn't very clear. There is no yellow rod where the bullet clips on so where exactly do you mean? :)

epicbobman52 (author)Lowney2011-03-23

srry i meant to say that the yellow rod disconects from the grey clip on the back of the firing mech

Lowney (author)epicbobman522011-03-24

Oh...this only just appeared after I'd written the big explanation above then lol, just ignore all the stuff I say about the hinge pieces then!

epicbobman52 (author)Lowney2011-03-25

k thanks i think the problem was that i had the rubber bands were on the firing mech itself and not on the hing, ill try it out noe

Lowney (author)epicbobman522011-03-25

Cool, remember, you only need one band, you don't need a million to hold the mech down, it's only to hold it down when the gun is moved about. Think of it like a block trigger gun: the block trigger only needs a tiny elastic band, regardless of the amount of power on the ram. Well, the SRv2 mech needs very little force to hold it down, one band is all I needed and I used bungee cord :D

epicbobman52 (author)Lowney2011-03-23

this pik should have been with my post

Lowney (author)epicbobman522011-03-24

I see, are you placing the bands on the trigger mech itself? Or are you putting the bands on the hinge connectors? They should be on the hinge pieces, not the release mech. Now, you have your problem because there are too many rubber bands on the barrel (the bands that fire the ammo I mean), so there is a lot of tension and more force is required to lift the mech up. I'd recommend either using less bands for shooting or alternatively using electrical tape strengthen the pieces (at the faulty end of the yellow rod). However, first of all, I would advise you to replace the yellow rod, as well as the clips on either end. For example, if it's the dark grey connector that the yellow rod is snapping of, then replace it with a newer one that is stiffer, and if it's the hinge piece then use a newer and stiffer one of those instead. Hope this helped!

dansdoc (author)2011-03-11

yay i got more knex =-)

ps pause the video at 1:49 and theres a y connector!!! you said theres none!!!

Lowney (author)dansdoc2011-03-11

Yeah that was for a side attachment which you don't need, nor would I recommend it. It's just aesthetics, hence it isn't actually in the instructable.

dansdoc (author)Lowney2011-03-12

ha ha ha silly me

dansdoc (author)2010-12-14

darn it only 50 (take or add a few) yellow connecters!

Lowney (author)2010-11-11

Nothing really, a faster reload time I guess lol

skyfaller (author)2010-10-17

By ''assemble'' you mean put together the main parts, right?

i read 20 seconds, and i thought this gun was really simple.

Lowney (author)skyfaller2010-10-18

By assemble, I mean put the gun together from it's segments. Like in the video. Not actually build it.

knexsniper123 (author)2010-07-29

i broke this gun

Lowney (author)knexsniper1232010-07-30

FFS will you just give it a rest? I've tried to help you, but you're questions are soo vague. For example, o the intro step, you wrote "you didn't tell us where to put one of the parts" WELL WHICH DAMN PART WAS IT!? If you don't tell me, how the HELL am I supposed to help. I know this gun works, watch the video, Axiys Zx got it to work, another of my subscribers (whose name I forget) got it to work, so clearly you are far too unskilled to make something where the instructions are placed right in front of you, you are just far too arrogant to work stuff out for yourself. I think you ought to consider you're user name as a COMPLETE OVERSTATEMENT. JUST DON'T WHINE TO ME WHEN YOU'RE COMPLETE LACK OF SKILL IS YOUR DOWNFALL. I'VE BEEN NICE UNTIL NOW, I'VE NOT RISEN TO YOUR HATE COMMENTS, BUT THIS IS THE FINAL STRAW.

theoffice101 (author)Lowney2010-09-26

Thanks for the idea for my gun! plus can u please check out my YouTube channel . Thanks

theoffice101 (author)Lowney2010-09-19

LoL! You told him! Please sub and check out my gun, PLEASE!

Mace! (author)Lowney2010-09-17

WOW I laughed so hard! That Knexsniper123 guy has posted like 100 comments and you treys so hard to answer them all.

Lowney (author)Mace!2010-09-17

I tried to stop him saying stupid stuff like that.... It didn't work :|

Mace! (author)Lowney2010-09-18

Maybe now he'll shut up ha ha

Lowney (author)Mace!2010-09-18

He can, he will and he just did XD

knexsniper123 (author)2010-07-30

straw i thought it was the final seaweed straw is ok though

About This Instructable



Bio: I make instructables. I also have a YouTube channel at!
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