Introduction: SRv2

Picture of SRv2
If you don't have any K'nex and want to buy the parts for this beast you'd better fork out $140 and you won't get much change!
With a proven 500ft+ range! Enjoy the video, and if the thought "This is pretty good" even briefly crosses your mind, don't hesitate to rate 5 stars!
BUT! If you don't have the parts to build this gun, then go straight to step 6 for part savers and mods.

THE OLD VIDEO IS NOW ON THE LAST STEP! Watch if you want to see the SR-V2 at close range!

The Last picture is what remained of the power gauge. (the white bit was all I could find from the first attempt, and I replaced it with a blue bit and shot from further away. I gave up after that!)

Step 1: Build the SR-V1

Picture of Build the SR-V1
Oh yeah, don't bother with the bipod, its rubbish.

Righty ho, the trigger frame, Carrying Handle w/ Sight and the barrel all need changing! When you get to those steps, refer back to this intructable to see what you need to do.

Picture 1 and 2:
1) Right, see the grey connector (outlined in image notes), replace it with the hinge seen in picture 2.
2) Ignore ALL of this photo except where the hinge goes: my gun is different from the SR-V1 to save time, effort and pieced :D

Picture 3:
Ok, don't try and leave the barrel open, it will not need to be opened in anyway BUT do not attach the 3 blue rods that are circled in red.

Picture 4:
IMPORTANT: It is essential that you leave the gun in this disassembled state.

SR-V1 parts list (This includes the firing mech too, so think of it as an estimate):
4x yellow
61x blue
288x green
244x white
6x black/strong ones

8x light grey
11x orange
the big one yes 335x yellow WOW
4x dark grey
10x y connector
2x purple 3d connector
2x blue hinge
2x black hinge
3x blue 3d connector
3x black ball joint
1x gold splice
7x red connector
By Oldsmobilefreak

Step 2: Firing Mech (UPDATED)

Picture of Firing Mech (UPDATED)

Picture 1:
2 yellow connectors, 2 white rods, 2 green hinge pieces, 2 black y connectors, 1 yellow rod, 1 grey connector, 2 blue rods

Picture 2, 3, 4, 5, 6, 7:
The mech itself, the pictures couldn't be easier to follow (the last picture is a different angle of picture 6 to confirm that you got everything right.

Step 3: Trigger Mech (UPDATED)

Picture of Trigger Mech (UPDATED)

These pictures may be a little hard to see, leave comments if you think they need upgrading (and how!)

Picture 1:
Simple, attach a yellow rod to the blue hinge piece from the trigger frame (step 2).
Picture 2:
Clip the blue rod from the firing mech onto the end of the barrel and attach the yellow rod as shown (better to see in pic 3)
Picture 3:
Overview of what you have just built.
Picture 4:
Bit hard to see, but this is very easy, hook a band around the black hinge (again from step 2) and hook it back round the little red rods at the bottom of the trigger frame (better seen in next picture)
Picture 5:
What you've just built, sorry I don't know what that hinge is doing in the middle of the white background sorry. Pull the trigger, it should be fairly obvious if it doesn't work.
Picture 6: Fix the rest of the barrel on to strengthen it and protect the flimsy bits.

Step 4: Loading and Firing

Picture of Loading and Firing

The first few pictures show how to make the ammo:
Picture 1:
KillerK's bullet. It is a dark grey connector clipped onto the end of a red rod with a green rod slid through it, all held in place with surgical tubing. WARNING: THE FINS ARE NEEDED! The bullet will work fine, but it will spin in the air which decreases velocity and the range and the power.
Picture 2:
My Bullet! Cheaper and requires less effort. Mine is identical to KillerK's except that it is held together with tape. Tape is weaker but saves the money and effort of buying tubing.
Picture 3 and 4:
4) lift up the mech
5) Insert bullet. Give it a good tug: it should be almost impossible to remove without pulling the trigger if done correctly.

Achieving High ranges

This is what KillerK did (as do I for most)
"Surgical tubing is the same material used to make sling shots
its like a super powerful rubberband
i use scotch tape for the fins
i make the fins small
if u r shooting on an angle for distance and a little electrical tape around the front of the rod just behind the tip to add weight
increase the weight without disturbing the aerodynamics and the rod will cut threw the air further
for straight shots the lighter the rods the faster the rod will travel so the straighter it will shoot"

Step 5: Converting a Current SR-V1 and "is It Worth It?"

Picture of Converting a Current SR-V1 and "is It Worth It?"

Got an SR-V1? Same here: convert yours in minutes!

Picture 1: The mighty SR-V1!
Picture 2: The mighty(er) SR-V2!
Picture 3: To put simply, I'm pretty lazy, so in fact the bits from the SR-V1 mech that are tricky to remove ARE STILL IN PLACE, so in fact if you remove this red track, you will find a stripped down version of the SR-V1! I would not recommend doing this, as for some people the bullet smacks into the tracks and and the tracks fly off and several other bits will either shatter or fall of. This has never happened to me personally, but I took mine off anyway, to reduce possoble resistance to the bullet.

SR-V1 and SR-V2 differences:
Besides the trigger, there are other difference to th two guns (thanks to KillerK for giving me this list)
"the v2 is basically a heavily modded v1
the barrel is much shorter
shorter body
shorter stock
hundreds fewer pieces
the sling front is connected in a much sturdier fashion
the connection points of the major parts r much sturdier barrel/body body/grip
the stock connection is stronger
new rod hold/release mech
new trigger mech
new cheek rest
new comfortable butt lol
new foregrip
new ammo storage
pretty much the only thing that hasn't been improved upon is the look/basic design"

Also, the SR-V1s range (that KillerK got) was 300ft (about 100m) but the SR-V2 got 500ft!

Step 6: Helpful Mods:

Picture of Helpful Mods:

SR-V1 pistol (works with SR-V2 mech, but it has a slightly weaker structure):
By nickkoppelaar

SR-V1 Mods+ No More Exotic Pieces (new mech, just ignore):
By I like it

Mini SR-V1 (BIG part saver)
By: tbone121

SR-V1 Bipod mod:
By: tbone121

KillerK/Sniperion SR-V1 Mod
By: Sniperion

By: Lowney

*Check the pictures: mine just saves yellow connectors by replacing the lower ones with white and blue (in pattern:D). It also has a different stock and trigger frame attachment for a massive reduction in parts. The first picture is not the full gun, I just removed the stock so the whole thing would fit onto the picture. also found this little gem: A mini SR-V2! This was Mepain's answer to a more compact SR-V2. Also, If anyone has a varient of the SR-V2 then leave a pic in the comment section/my orangeboard and it will feature on this instructable!

Step 7: Point Blank Power!

Sorry, Youtube removed the audio :(

The song was "Guns and Roses -Chinese democracy" and my old icon appears randomly for a while with nothing going on: there was like a warning announcement being made (from our dear friend Richard Hammond)

Also, people have pointed out that it is inaccurate: THE ROD DOES NOT BEND UNDER THE FORCE (lol) you'll know what I mean if you watch it.

And to stop people asking the gun in the second picture is a Lahti 20mm semi-automatic anti-tank rifle


lollolman148 (author)2011-07-01

i fired it and the nxt day i heard on the news about knex being found on mars...


Lowney (author)lollolman1482011-07-02


T-man (author)2011-02-09


KnexFreek (author)2009-12-05

Hey lowney check out the best knex sniper on this site:

parshan (author)2017-05-17

I bought a bulk pack of 360 yellow connectors just for this gun. Can't wait to finally fulfill my lifelong dream of killing someone with K'nex!

The Knex Inventor (author)2017-01-19

Finally! Where did these instructions go? I have already built the SRV2 from other instructions because I couldn't find this Instructable. What happened to it?

sven12 (author)2014-11-06

how do you get the parts for something like this??

sven12 (author)2014-11-06


knex fire arms (author)2014-03-08

So basically all you did was replace the mech in the gun ? Lownley

Kona-chan (author)2013-08-28

500 foot?
sorry but hard to believe, cause most knex guns don't come further then 50 meters

metalsonic (author)2013-03-27


knexsniper1 (author)2013-03-04

Can someone explain to me how the trigger mech holds the bullet and prevents it from flying off??

Lowney (author)knexsniper12013-03-05

The grooves on the blue rod grip the end of the red rod. It doesn't really look like it should work but it does :-)

knexsniper1 (author)Lowney2013-03-06

awesome! Thanks for explaining :) Btw, are you still an active knexer??

Lowney (author)knexsniper12013-03-07

Not really, I no longer live at home (where the knex is), but sometimes I visit and if my younger siblings or whatever want me to help them build something I will, and if it's awesome I might share it :P
I'm more into YouTube now, I do a lot of speed arts and such, my channel is (totally shameless plugging ;D)

knexsniper1 (author)Lowney2013-03-07

Ohh ok. Cause I was wondering if you'd be willing to collaborate with me on a project? It's a sniper that I was working on

Lowney (author)knexsniper12013-03-08

Yeah sorry, I mean feel free to use any of my mechanisms or parts of any of my guns, I don't mind, but I guess other than that I probably can't be of much help, sorry! But if you're stuck with anything (like can't get a removable mag working or whatever) feel free to inbox me :)

knexsniper1 (author)Lowney2013-03-09

Aright! Check your inbox soon, I mentioned the design of the gun

mushroomcloud13 (author)2012-06-14

How many of the hinge connectors do you need?
I dont have any but Im sanding down grey connectors with a dremel. So far Ive made one complete one and it works perfectly

Lowney (author)mushroomcloud132012-06-15

Well you need two of the green/black coloured ones, and then you need a pair that actually "connect" and work as hinges if that makes sense. The third picture in step 3 shows how they're all arranged :)

Lowney (author)mushroomcloud132012-06-15

Well you need two of the green/black coloured ones, and then you need a pair that actually "connect" and work as hinges if that makes sense. The third picture in step 3 shows how they're all arranged :)

darthbindy (author)2011-12-13

since i dont have enough knew to build this (i think) i only have a box of about 20 pounds but i dont think it has the right peices, so im going to make one of these out of wood and piping........yay! might post it wen done................

Lowney (author)darthbindy2011-12-14

Sounds awesome! Send me a link on my orangeboard if you do!

darthbindy (author)2011-12-13

*knex, not knew

PotatoCoffee (author)2011-12-03

A bit of constructive criticism, the stock is pretty weak looking, (very skeletol) and the barrel seems to curve down (probably the weight). I realise this was your first knex gun so I'll let you off!


Lowney (author)PotatoCoffee2011-12-05

What part of the stock is skeletal?

PotatoCoffee (author)Lowney2011-12-05

Image belongs to Lowney

The very end of the stock.

Lowney (author)PotatoCoffee2011-12-06

If you're talking about the bit with the red connectors and white rods (the vertical bit) I deliberately made it like that because it bends to the shape of your shoulder much more easily than a normal stock. Since I appreciate most people don't like this the normal stock is in this instructable.

PotatoCoffee (author)Lowney2011-12-06

Oh okay sorry 'bout that.

Lowney (author)2011-12-03

Whilst I don't mind you showing me stuff like this on my orangeboard, I'd appreciate it if you didn't place these links on my actual instructables since it's blatantly just trying to steal some traffic and you'll probably get a negative reputation on the site if you keep it up. Especially if said instructable has a relatively high view count.

PotatoCoffee (author)Lowney2011-12-03


DracoUltima (author)2011-10-27

When will you change the instructable and say that this gun did not reach 500 feet? Your video CLEARLY shows that the the bullet curved over the next house, meaning that it was only able to get 130 to 150 feet. I have built TWICE, put on surgical tubing until the barrel was about to snap, and it only hit 220 feet. I am almost positive that you admitted it sometime ago, yet, you never bothered to change this..... Why? Is getting more views and 5* worth the lies. There was no evidence of 500 feet. The little picture proves nothing, just change it so you don't misguide the beginner builders.

Lowney (author)DracoUltima2011-10-28

Yup, the video does indeed show it curve over the next house. It's unfortunate that you cannot see the houses beyond that as it flew over them too. And no, I have never admitted that the video was fabricated, because it isn't. KILLERK can back me up here when I say that this gun is capable of 500 feet.
     One thing that you should understand is that I simply have no reason to lie about the gun's range. If, indeed, it couldn't shoot 500 feet I would say so. I would do this because this is not my own gun, so if anything I would set out to disprove its range, not prove it. It wouldn't affect my reputation as a gun designed in any way, shape or form as this is KILLERK's design. If this gun WAS my design, then maybe there would be reason to question the video.
    You sound almost angry that this gun has a high rating and lots of views, but you really shouldn't. 5* instructables are relatively common now, since it doesn't take too many high scoring star ratings to max it out. And as far as views are concerned, this isn't YouTube; I'm not making any money out of the views or anything, it's just because this is one of the more famous guns and I was the first person to publish an instructable on how to build it.
    To summarise...the video was not a fabrication, and there would be no point in me making a fake film anyway since the gun isn't even mine, and it would likely still have the same rating and view count if the range was lower anyway. 

DracoUltima (author)Lowney2011-11-10

Actually, I was pretty pissed about something that day (something personal), but I still don't believe that this gun reached 500 feet, as I have tested it myself. I won't argue any further as it will solve nothing, sorry if my comment from before sounded harsh. You can stay with your statistics and I'll stay with mine.

zbrown2016 (author)2011-08-25

Um ha ha how do you stick the bullet in there. Um I can't figure it out

Lowney (author)zbrown20162011-08-26

Just look at the photos, it's pretty easy. There are more photos on my compact SRv2 instructable if you're still struggling. You have read step 4 right? :)

zbrown2016 (author)Lowney2011-08-26

Ya but does it tell you how to put the bullet in

Lowney (author)zbrown20162011-08-27


CODKING (author)2011-08-09

and the power is nothing like iv ever seen before its just insane. How durable is it like is hard to break it or does it withstand quite some force?

Lowney (author)CODKING2011-08-11

I guess if you snapped it over your leg or something it would break, but providing you add ALL the blue rods in the barrel, if dropped on concrete, the damage to the gun would be very trivial, the handle would probably fall off but that's about it, and even that can be avoided by using strengthening beams shown on pictures 3 and 4 of the intro

CODKING (author)2011-08-09

damn im gonna have to get a lot more yellows if im gonna build this i hope i can find some cuz this looks pretty fun to build to especially to pass the time

tincanz (author)2011-07-05

This is incredible!
The best I have ever been able to get with my guns is around 40 feet.
This style of your's though, had not occurred to me....

So, is it simply a gigantic slingshot?
It seems that the bullet is pulled directly by the rubber band(s), and the barrel length is only for the bands to cume to full stretch. Correct me if I'm wrong but this is a slingshot with a mechanism to control release.

This design is intruiging!

Fred the evil puppet (author)2010-10-10

where does the mechanism clip onto on the gun?

Do you think you could be more specific? Are you referrinng to the release mechanism (made in step 2) or the trigger?

the release mech

okay, So you should have connected it to the yellow rod to start with, and hopefully you'll have thread the blue rod through the centre part as shown in step 2. Simply snap this central blue rod onto the half moon connector at the end of the gun. This is shown in the last picture of this step, but if you still can't figure it out there are 2 excellent pictures for you to follow, probably better than the one in this step to be honest. Hope this helped! :)

destroyo5457 (author)Lowney2011-06-24

okay so i have the stock built for the gun and your realease mech. but i have no idea how to build the barred becase i dont know how to make the part where the release mech. clamps down onto to bullet.. (the other part holding the bullet when its loaded) please respond with help :) and btw.. i think i love this gun, better than gorkem's sniper rifel.. :) o and one last thing, have u ever tried surgical tubing instead of rubber bands? - thanks, josh

Lowney (author)destroyo54572011-06-24

Not surgical tubing, but I use a kind of galvanised industrial rubber type thingy (I think it's what it's called lol). What do you mean "I have no idea how to build the barred" though? Do you mean Barrel? if so, the barrel itself is no different to the SRv2...I'm a little confused about what you mean about the release mech, could you post a picture and run it through MS paint or something to outline what you're stuck on? I'll try to offer as much help as I can :)

destroyo5457 (author)Lowney2011-06-24

okay i figured it out! and yes i ment the barrel, srry. okay so i was talking about what prevents the bullet from flying out.. so there is the top blue connector on the mech which locks the red peice down against the 2nd blue piece that is in the mech... so i figured it out and me and my neighbor built a bullet with fins, fired it, gawked at how freaking far it went, and then freaked out when it fianally landed 2 freaking houses away!!! haha amazing amazing amazing gun! i love it, and thank you for responding too :) - thanks, josh

About This Instructable




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