Cheapest Ever Automatic Lawn Mower

I saw this while using StumbleUpon and thought I had to post it since it was so in the spirit of Instructables. What a brilliantly simple but clever hack! (Not to mention dangerous)

Posted by Jayefuu 8 years ago


Engineering, automatic gate

Hi everyone i'm building an automatic swing gate (for my project) which uses a pneumatic actuator to open it but i'm struggling to determine how the gate is going to close, as the actuator does not have a longer stroke. i only have two and half weeks left for my due date, any help would greatly be appreciated. thanks

Posted by swazelafirenze 2 years ago


Automatic Blind Opener Advice

Hi, I am thinking of putting together something that will able to automatically open and close my blinds as the darkness outside dictates. Ideally, I am hoping to attach the opening/closing pole to a DC Motor, which would be controlled by a light sensor. I was also toying with the idea of powering the system with a rechargeable 9V battery that could be topped up with a small solar panel attached to the window. Is this idea doable and, if so, any advice on parts and putting it together would be very much appreciated.

Posted by elsmandino 2 years ago


Automatic save feature wasting a lot of time and energy

While I was writing a lengthy instructable my parts list step was somehow pasted to every other step erasing what I had previously written.  I had already saved my work before this so I thought I could just go back to my previous save.  Too bad my work was automatically saved.  This feature is terrible.  Please get rid of it, we all know how to use a save button. I suppose the actual bug was in my one step being copied over every other step wasting a ton of my time.

Posted by Spaceman Spiff 6 years ago


Automatic pet food dish

I want to make a pet food dish that rations out pet food at specific intervals. Something similar to this http://www.petronic.com/sixday.htm it doesn't have to be a circle, I could probably figure out how to do it with a pulley system and motor if it was straight, but I need to find a timer to trigger the motor. Does anyone know where to get a timer like that, or what I should search for. I've never built anything before, so I don't know anything, or what to search for. Thanks for any help.

Posted by celtictrinityknot 10 years ago


Automatic coop door

Does anyone have a automatic chicken coop door diagrams. 

Posted by Nhoca1965 3 years ago


Automatic knex gun ideas.

Hey people! im thinking of making an awsome fully automatic knex gun but im not sure what to make it look like or to model it after a gun.... so got any ideas?

Posted by longboardboy 8 years ago


Automatic slideout drawer

I am looking to build a drawer that will automatically open and close by the flip of a switch. What would be the easiest way to set it up? The drawer will only need to hold several pounds up to ten at the most. Any suggestions?

Posted by renter 8 years ago


Possibility Of A Fully Automatic Knex gun

I have created an idea (i think) to make a gun fully Automatic. Fully Automatic, meaning that you can hold the trigger and fire until the mag is out of bullets. I am pretty sure with some tweaking my idea will work but I have to get around to doing it. I would like some input or some tips as far as what to try. No I'm not going to share the exact idea just yet :)

Posted by Moeses 9 years ago


Automatic Potentiometer

Hi!  i need and automatic potentiometer it has to works max 5v i thouhgt about that and i can make it manually but it's to big and to weird  i want to ask you a form to make  it whit electronic components or a component ho can makes it i want to make a motor acelerates and desacelerates whith a soft curve and if its posible put the time of the cycle (example 40 seconds acelerat.... and .. desaceler...."cycle" or similar) Thanks Sorry for my bad english! Thanks! 

Posted by labalavermella 6 years ago


injection device

 I want to build an injection device that can handle insulin syringes. Please help.

Posted by phamw 7 years ago


Need Help

HI. So I need to slightly depress the button on a digital camera every three minutes or so. SO if there was some device that gave me a little movement every 3 minutes I could lock it into an enclosure with the camera and everything would work. I can imagine the invention but I don't know the names of the electrical components needed. Thanks in advance for your help.

Posted by nickdanger1985 6 years ago


automatic water drop down / automatic syring

I want to make one automatic water drop down instrument , and i need help. i need it for water surface angle determining

Posted by ksd71 1 year ago


Twin Shot Semi Automatic Knex Gun?

I've been working on this gun for about 3 days now, and im woundering if it is "unique" enough to put on Instructables. Please comment.

Posted by My Pie 10 years ago


Knex Automatic SMG

This is my fully automatic knex gun that I have had since October although I have been working with the rack and pinion mechanism since last year, the system that it uses works well however I can't seem to get a good green rod magazine on it. Can you help me please?

Posted by Loosewire; SOE Operative 10 years ago


knex automatic rifle

I had an idea to make a new (i think) type of knex machine gun. it is like knexwizard's semi auto rifle but it has a single shot trigger from viccie.b's crossbow. i made it but it fired its whole magazine (20 grey connectors) in one shot! after modifiying it to put tonnes of friction on the wheel that holds the bands i got it to fire its mag in two shots- still not good enough. can anyone help me?

Posted by the VINdicator 9 years ago


Automatic Blackout Switch , Help ?

I have an emergency light in my room , the light turn on when blackout happen i wonder , can i make my room ceiling light like that ? when blackout happened , it's automaticaly switch to emergency power [ using deep cycle lead acid battery + inverter ] , but when electricity turn on again , the switch turn back using the normal electricity line , and charge the battery i have trouble design this , can somebody give me advice ?  the power to handle is 220V , 500W thanks Jeffry

Posted by Lycrois 8 years ago


automatic sliding door

Hi,  I ve been looking all over (www), and I can't find any useful tips, tuts, ... about modding an existing sliding door into an automated one.  This without ordering a ready-made system, which costs many $$$$. I 've had this idea for a while already, and I admit seeing https://www.instructables.com/id/Air-Powered-Star-Trek-Style-Door/ brought the brain to bubble again.. If anyone has some experience with this or can share some interesting links ? (re-use an old engine from something..., controls.., touchpad/sensor, ...) would be great. thx D

Posted by dimicool 7 years ago


Automated Lighting?

Hi there, I am renting a place for my new office for 3D animation and I wanted to make an automatic lighting system to turn on lights when I'm in a room and off when I move to another room. How easy/hard is it to do that? And what do I need to make my light switch on and off slowly? Cheers, Shawin.

Posted by beatoven 10 years ago


Prop-Gun idea

I don't have that much confidence in getting this to work, but as an idea I thought I'd share it: I have a concept of a rotating-barrel automatic-chain-gun, that I can do no problem. BUT, to simulate muzzle-flash, I'm thinking of feeding butane/air down the barrels (blow-lamp type device) and igniting it. Initially, I think of slip-rings or similar and a camera-flash unit for ignition, motor drive on the barrels. Any advice? L

Posted by lemonie 8 years ago


Automatic Solar Dog Door Opener

I have a dog door (http://www.hartleyglass.com.au/images/pet-door/pet-door3.png) but my dog is a bit anxious about opening the door with his head. I can't say that I blame him really. So I want to attached a solar powered device that would open when he is near by. I imagine I would mount it above the black bar, outsize where the is light with the solar panel wedge, attached to the door (see image uploaded).  I don't really know how to go about it.  The major components would be: 1. Solar panel wedge and batter (power source) 2. Proximity sensor (maybe RFID attached to my dogs collar?) 3. Motor (not sure how to detect when the door is opened or closed. etc etc  How does one go about building something like this? Any direction would be great Thanks Wayn

Posted by lucidwayn 6 years ago


Help in constructing a battery charger

Hi there! I need some help constructing a circuit to charge a lead acid battery. The ratings of the battery are: 12v, 7Ah(Or so). The circuit must have the following features: -> Must be fairly simple (Considering the fact that i don't get all the components easily in the place i live, not even online) -> Must automatically cutoff when the battery is fully charged(Or near full). -> Must also have an indicator, (like the ones we have in a digital camera battery charger, which shows RED LED=Charging, GREEN LED=Full, something like that). -> Charging times can be fairly reasonable (Few hours for a full charge sounds reasonable).  -> Hopefully, some explanation on how the circuit works. ;) Thanks in advance :)

Posted by charmquark 5 years ago


F-N-R transmission from old ford Tranny

Okay I'm making a 2F1R (2 forward 1 rear) trike from and old 550 GSX Susuki. I have seen many builds for electric reverse drives. I want a Mechanical Drive F-N-R gearbox. I have never opened an transmission "YET" but Im about to. I have a Ford AOD Automatic Overdrive out of a F-150. Does anyone know how to get to the Planetary gears? Once I get them out I want to make a metal case to mount between the Engine and Rear Swingarm so that I can use the engine to power the reverse. Here n Georgia there are some very steep driveways and parking spots. I'll need the power from the 550cc engine to back out. Thats noping also I dont just spin the tire off doing it LOL

Posted by UntamedGypsy 8 years ago


Download and sign in issues

 I am having an issue with attempting to download the pdf file. I have paid for the Pro account and have not incountered this issue until today.  When I sign into my account and then click the download this file in pdf it asks me for me account user name and password. I enter the information and then I am signed in but when I go and attemt to download the file it asks me for account user name and password once again, even though I have not signed out.  Never had this issue with other sites on on Instructables. Currently using IE 8.0 with Win XP Service Pack 3

Posted by spllbnd2 8 years ago


Knex Gun Full Auto New Mech : VGN 013 .

Hello ! So this is my new K'nex gun , a bolt action gun , with a full auto mechanism and a new design . Here you have just a draw of the mech and the design because I need a new SD card for take picture ... The gun are very compact and small , the handle is ok nd the trigger is very simple . Before the VGN 013 , there is the VGN 012 , a simple gun with a great mag , the same design and a good trigger . After my other guns in constructions : a full auto sniper with the mech of Oblivius and a machine gun with a true trigger , I will create the VGN 014 , a semi auto gun , but now I have only finish the fully auto sniper ... See you my next gun , - Guiguivinvin -

Posted by Guiguivinvin 6 years ago


AC Wall Unit Timer/Thermostat

I have an older AC wall unit in my apartment. It has 3 dials – one for temperature (1-8 where 8 is coldest), one for fan speeds (low cold, high cold, low fan, high fan), and a manual lever that opens the vent in the back. I’m reciting this by memory as I haven’t actually looked at it closely, but it has one of the larger 3 pronged cables that plugs into a dedicated outlet in my wall (perhaps used for a higher voltage). In any case, my intentions are as follows:    • Have a timer for the AC unit to plug into to turn off on programmable intervals           o Monday – Friday it will be on after 6:00pm until 7:00am the following morning.    • One nice feature would be to give it a thermostat capability.           o If the temperature is below 70 degrees during these time intervals, for instance, then the AC unit will shut off, otherwise it will power back on.    • Another obscure (and I’m sure complex) feature would be to allow remote access to the timer. I know that this requires some unique hardware, but I’m familiar with programming and can visualize the methodology in telling the timer/thermostat unit a different set of commands (let’s say I know that I’m coming home early – I send information to the device via the internet to have it turn on a few minutes before I get home). I understand the last part is quite complex, but it’s not a priority at all, rather, a neat little feature that would make this all the more worthwhile (and in my eyes more interesting). I know that there is a similar device out there (can’t remember the brand name) that has a lot of these features, but I’m not willing to drop $300+ on something like that. For now, my priorities are listed in order per the bullets. First and foremost is being able to program a timer for a wall AC unit. Second is to have it detect the temperature of the room and set it accordingly. And third is the availability to ‘talk’ to the device remotely. My question for you is: how can I get through the logistics on this sort of project? What components (hardware) am I looking at (general price range), and what degree of difficulty will this entail? I have my computer practically right next to my AC unit, so communication with the device won’t be difficult in those regards. Otherwise, I’m just looking for tips and pointers. If someone happens to know of a (cheap) unit that does most everything that I’m looking for, then great. I’m all ears and really appreciate any feedback.

Posted by Phoenix5794 6 years ago


Semi or fully automatic knex gun.

I know you people don't believe anything without pictures, but, I DON'T CARE!!! I have a video! I promise! Ok, this is a semi-automatic. Pull trigger, boom, pull trigger, boom. That is it, no pulling back the ram or anything. I have not made the fully automatic version, but all it needs is a motor on the trigger and it will be fully automatic!!!!!!If any one wishes to post instructions on this gun, I hereby give you permission as long as you give me credit. Watch the video here.

Posted by Whaleman 11 years ago


New Chain MG!!!

This is my new MG/Chain/Gatling gun I put together. It crosses oodalumps chain round, oddalumps MG, and Sharpshooters gatling gun.

Posted by KamikazeSniper360 11 years ago


Articulating Wall Display

So maybe I just watched too many movies as a kid, but I thought this would be a neat wall display to have. It's based on those old shoot-em-up movies where the main guy would go to the giant room of guns in the fancy displays, expect this wouldn't be for guns (though that would be cool). I remember one movie where some pistols were on a display on the wall, and when the guy pressed a button the display moved out to a 45 degree angle. That's basically what I want to do. Not sure if I could really explain it, so I tried my best to draw my idea so far. There would be a base that's connected to a wall that doesn't move and the display which would move. The top of the display would be attached to slots in the top of base and could move up and down. The bottom of the base would be attached to the middle of the display and would push the display out. Sorry if I'm not making sense, can't find a good way to explain it. I don't know enough about electric motors and controllers to make this or it would be my first instructable, so if someone else wants to make it, please let me know how it's done. This would be fun to see in action. Cheers!

Posted by Echo86 8 years ago


Automatic Center Punch

Does anyone have a crossection of an automatic center punch and a description of how one works?

Posted by watermelon 10 years ago


how to make a fully automatic homemade chicken egg incubator

How to make a fully automatic chicken egg incubator?

Posted by arfannasir 4 years ago


D.I.Y.: How To Build A Fully Automatic Cat Door?

Paying over $300 for one, is just too much. plus 40 bucks for each collars. Do anyone know How To build a Fully Automatic Cat Door? http://www.hitecpet.com/powerpetdoors.html

Posted by marquita188 7 years ago


3 Bipolar Steppers

 I am selling three stepper motors that I was wrongly shipped by a vendor. For specs, PM Me. 10.00 Each

Posted by 16zzundel5 8 years ago


Automatic Irrigation using d1 mini

Hi Everyone, I reviewed different automatic irrigation system projects here in instructables and other sites as well and i decided to gather parts to do a simple small project myself. One thing that comes hard is the programming part as I don't know any programming language. I'm looking for some help with code merging, explanation and some general guidance. Could you please let me know, point me to right direction and tell me what you think and if requirements are actually achievable? What I would like to achieve: Intention of this project is to have manual and auto irrigation system which will: 1. Measure soil moisture and dependently on the value activate the usb pump which will water the plant (preferably analog output that will show the measurements in %) 2. Manual activating the pump via hardware button and via mobile phone with internet connection 3. Distance sensor which should measure how much water is left in the tank 4. Email notification with info when to water the plants and soil sensor data regardless of the automatic process that has already started 5. Email notification with info about the water in the tank when it’s near empty 6. Dashboard preferably inside the network (not using third party like blynk or others) with access from the internet (I have QNAP that I think can be used). 7. If possible – have amazon echo (Alexa) read the sensor data to tell me the values and comment if the plant should or shouldn’t be watered or the tank should be refiled or not as well as ability to ask Alexa to start or stop the irrigation Hardware: D1 mini: https://wiki.wemos.cc/products:d1:d1_mini Wemos V2 Relay shield: http://hobbycomponents.com/shields/865-wemos-v2-relay-shield My relay is slightly modified: 2 small wires soldered to the vcc and ground so that when it receives the signal on d1 pin it opens and current flows to female usb connector supposedly activating the usb water pump. All this can be stacked together even with soldered wires YL-69 sensor: http://www.oddwires.com/yl-69-soil-hygrometer-humidity-soil-moisture-detection-sensor/ Ultrasonic Distance Sensor (HC-SR04): https://thepihut.com/products/ultrasonic-distance-sensor-hcsr04 USB mini water pump: www.goo.gl/yUABDd Button x4 if needed: Board x4 if needed: sample codes used in other projects: https://randomnerdtutorials.com/guide-for-soil-moisture-sensor-yl-69-or-hl-69-with-the-arduino/ https://create.arduino.cc/projecthub/nekhbet/using-the-yl-39-yl-69-soil-humidity-sensor-with-arduino-968268 https://community.blynk.cc/t/irrigation-relay-with-timer-esp8266-wip/700 Alexa enabled homemade cat feeder example: https://www.hackster.io/darian-johnson/alexa-powered-automated-cat-feeder-9416d4 Thank you very much in advance for your help and support.

Posted by wube 1 year ago


Key Fob for a Bicycle

Hello all! I'm going to be shopping for a bicycle here in a week or two, and based on a conversation I had with someone I'd like to know if anyone has done this, or if it's even possible: Making a key fob for a bicycle. Even though having a locking mechanism on a bike itself is a dumb idea I'd just like it for kicks. Y'know, after I've chained up my bike somewhere outside a store, turn around and "lock" it like a car as I'm walking away. Seems possible, but I just don't know how to go about this. Anyone have any ideas? Thanks for your time and effort!

Posted by Energyzed 6 years ago


We need diferent types of semi autos!!

Hey guys while i was working on my new semiauto that me and kinetic were building i was wondering if any of you had any other ideas for a semiauto. i feel like we need more designs and concepts. i am willing to build upon your idea and recognize you. right now all we have is Kinetics KLS. V2, me and kinetics Kinno-1,and sharir's new semi auto. we need more than that. so please post your ideas here so othr people know whata your thinking. anything helps. seriously.  thank you innovanna

Posted by innovanna 6 years ago


fake fish for lazy or irresponsible people, how do i make them?

The problem: ----------------------------- hello. i've been wondering how i could make some fake fish. i live with my parents and want a small aquarium on my room, but i don't feel responsible enough for such a (silent) pet. so i want to put some fake fish in my aquarium. i want them to 'swim' around and look good. does anyone have an idea? my ideas: ---------------------- my first idea was using an old cd-drive, buy some fishtoys (or fishing equipment, i heard people use fake fish to atrract other fish), attach the fish to the cd-drive and then turn on the drive and see the fish swim around. the problem is that the cd-drive makes many rotations per second, so the fish would swim way to fast. i've been thinking about using magnetism in some way, but i could'nt figure out a good way to do this. anyone? closing: ----------------------- i appreciate any idea's. i have no problem with using electricity, but rather not in the water itself (rather above like my CD drive idea) thanks in advance.

Posted by tommiesmee 8 years ago


System for automatically changing TV channels according to a schedule?

Greetings, I am seeking a system of automatically changing TV channels according to a schedule. Either one that exists or how to build one. Thanks

Posted by NeuroPulse 7 years ago


Automatic baby cry detection

A friend of mine asked me today if I could help him construct an automatic crib for his newborn child. He wants to make a crib that automatically starts moving from side to side when crying sounds are detected. How do I make something to detect crying?! Where do I even start on this one.. ? :)

Posted by chr 10 years ago


Proper Semi-Automatic Rifles

Ive been on instructables for a while now but it seems that the only peron who has ctually posted a semi automatic gun is oodalumps, Im jus askin if any1 could build a properly semi-automatic rifle (Semi-auto means that all you have to do is pull back the trigger to fire and it fires one at a time, so its basicly a 1 round at a time machine gun)

Posted by Juls 11 years ago


SAOG- Semi-Automatic Oodjamaflick Gun

This is a semi-automatic oodjamaflick gun, or SAOG. I say oodjamaflick, but it's not actually oodjamaflicks, just a modified oodjamaflick. To the uninitiated, oodjamaflicks are the original oodammo; ammo that oodalumps' made for rubber band guns four months before oodammo. Nothing special, just a semi-automatic that gets more than ten feet. Fifteen feet more, to be precise. Total of twenty-five feet. That is, if you want a four round magazine. Here's the thing about this gun, you can have a higher magazine capacity if you are willing to sacrifice some range. You could have a one shot that went about forty feet- but then it wouldn't be semi-automatic, would it? Hit the link for more pictures and a video. http://knexinnovation.net/forums/viewtopic.php?f=18&t;=989 Or a real link for those too lazy to copy/paste. knexinnovation.net/forums/viewtopic.php Yes, this is a shameless promotion for KI and it's ability to host pictures from other sites easily.    

Posted by Whaleman 8 years ago


How I had a computer turn on automatically when the BIOS did not support It

So, I just got a Kindle and want to automate the downloading of news feeds to it. I wanted a PC to turn on when I woke up in the morning, download the feeds, transfer them to my Kindle, then shut off. First problem: The spare PC I put together for this does not support automatic startup in the BIOS, and neither do any of the other motherboards I had. So, I thought of a way to use an alarm clock to turn it on. When the alarm clock would go off, it had a speaker that would produce a tone. This means it was switching power to the speaker on and off very quickly. This would not drive a relay directly, so I made a "filtering" circuit consisting of a few transistors and a capacitor. When the clock goes off, it charges the capacitor with a transistor. This buffers the on's and off's into a kind of pulsating DC current into the cap. The capacitor drains into another transistor, turning it on. This activates two relays at once. One presses the button to turn off the alarm, and the other turns on the computer. Since the alarm was turned off just a moment ago, the speaker does not sound again and it does not turn the computer back off. In the first picture, you see two sets of black and white wires going into the PC. One comes from the relay to short the power switch momentarily, and the other goes to the +5VSB on the power supply. This line provides +5v at low currents, even when the computer is off. The 5v powers the buffering circuit. That was the difficult part and took about 4 hours. Everything else was easy. When you get a Kindle, Amazon gives you a free email address you can use to send files to it. I installed Calibre (an awesome free e-book manager) on the PC and had it run on startup. I set it up to download the feeds then email them to the Kindle through WiFi. Turning the computer back off was easy as well. All you need to do it make a shortcut to "shutdown.exe -f -s -t x" and add it to the startup folder. The .exe is the Windows shutdown program. -f force-closes any open programs, -s specifies a shutdown (instead of restart, logout, etc) and -t x is how much time it will wait before shutting down, in seconds. I set it to a half-hour. So, now I can have my news feeds on my Kindle before I leave for school. :D Funny thing is, the whole alarm clock bit could have been avoided if I wasn't too lazy to just press the power switch when I woke up in the morning! XD

Posted by 1up 7 years ago


Your instructable became popular ... again?

Maybe you could change the "your x became y" message to be different for each tier?  The email seems to be identical each time the popularity rises, and that just feels like spam. I don't really get the badges, either.  I thought at first it worked like the badges on stackoverflow. Instead of simply telling someone "your thing is not crud" you could award them a badge for being ++good, and have different badges for each tier.  Naturally, the email would have to be different for each badge, etc.  You could further motivate people by letting folks see each other's badge list.  Almost any action a person makes could be a badge - even a badge for having every other badge! I'm just thinking... young people.  play too many games.  they get game mechanics.  so reward them in a similar way, and they'll feel like contributing more.  work that pokemon "gotta catch 'em all" addiction.

Posted by aggrav8d 8 years ago


"automatically add files to this step" checkbox present in non-ible context

When updating my profile picture here:   https://www.instructables.com/you/settings?modify=IMAGES  A checkbox labelled "automatically add files to this step" appears, even though my profile is not an instructable.

Posted by jrspence 8 years ago


simplest way to automatically turn power on/off (every couple seconds)?

I'm looking for an easy way to turn power on and off every couple seconds (randomly would be nice, but not absolutely needed).  Such as for blinking an LED, not turning off all the power in a house.  Any suggestions?

Posted by aliasjanedoe 4 years ago


FULLY AUTOMATIC KNEX REVOLVER

Fully automatic 8 shot handgun/revolver features:8 shots, fully auto, challenging to make (but not to challenging) & good mechanism. i would like to thank mepain for the main idea and sypran for the clip (or whatever you call it). i hope this is an inspiration to you all, cause there aren't enough damn auto weapons out there. B.T.W modders are encouraged to mod and post this gun, over and over again

Posted by ultimachris 10 years ago


Sponsored Video Playing Automatically

Why do the 'sponsored videos' (READ: advertisements) at the top of most pages start playing automatically? I can only hope this is a mistake, because it is wrong on many levels. 1. Loud 2. Obnoxious 3. Unwanted 4. Makes me want to avoid Instructables (NOOOOO!) Sorry if those are redundant, but on top of the recent site layout fiasco, Instructables seems to have become a huge, messy commercial. I could live with that if only those videos didn't play automatically.

Posted by redplanet 8 years ago


logged in but automatically logging out

I've been reading instructables for two hours now, I can click thumbnails to see full pictures, I can download PDF's, I can write comments... but each time I go to www.instructables.com/id/Reduce_motion_blur_in_The_GIMP/ I'm automatically logged out, I'm no longer able to enlarge thumbnails, I can't download the PDF an it doesn't even accept my correct login name and password. As soon as I go to another subject I'm logged in again automatically.

Posted by Maggy160 8 years ago


How does this Automatic Pour Over Brewer Work?

I'm looking to build my own automatic pour-over coffee brewer. Does anyone know how the water spout is moving in that spiral rotation?   https://www.kickstarter.com/projects/invergocoffee/invergo-the-first-automated-pour-over-coffee-syste

Posted by Brennn10 3 years ago


High-power fully automatic rifle out of knex

Hey guys i have an idea to make an automatic kenx rifle that DOESNT USE A CHAIN like everyone elses think i should post?

Posted by mythbusterma 9 years ago