Introduction: K'NEX Gun: Reliable (R3) (Build)

Picture of K'NEX Gun: Reliable (R3) (Build)

The RMACR, posted on Mar 9, 2013, has always been one of my favorite builds. Efficient, yet simple, the Reliable (A.K.A. R4 / RMACR V.2) is a great indoor K'NEX War gun. After firing at least 100 rounds through it, I have yet to experience in using it. Getting ranges of up to (if not over) 50 ft. and being simple enough to mod into any shape, the Reliable is just that, reliable.

My reason for rebuilding this gun was simple, I wanted to revisit some of my "older" builds. Although this is the same mechanism as my RMACR, it has multiple changes from the first version. This version is longer, the sights are much better, the stock is stronger, the handle / grip is more comfortable, the attachments bars are new, and the trigger guard is cleaner.

- 16 rd. magazine
- Long pin pull
- Nice sights
- Great stock
- Sturdy magazine
- New attachment bars
- Comfortable grip / handle

Without further adieu, lets move on to step #1...

Step 1: Right Panel

Picture of Right Panel

In this, the first step, you will be building the right-hand panel. Note the blue rods and the white rods placed perpendicularly, as well as the grey gear in picture #3. Also, keep the image notes in mind. And, as always, if you need help, just ask. Once you finish this step, move onto step #2.

Step 2: Internals

Picture of Internals

In this step you will be working on the internals of the Reliable. You will see one or two broken pieces, but, if you check the image notes, few of them should be necessary. Again, the image notes should guide you through the tougher pictures, and if you need help, just ask. Once you are done with this step, move on to step #3.

Step 3: Handle / Grip

Picture of Handle / Grip

Now we are going to work on the handle / grip. This is a good place to start modding the Reliable. Go ahead and, as long as you keep the same connection system (the way the handle connects to the gun), make the handle to your preferences. Once you are done following the pics and modding your handle, move on to step #4. This step may not be as much in detail as some of the others, but since I hope you mod this handle to your preferences, you should not have any problems. If you do, however, drop me a note.

Step 4: Trigger Guard

Picture of Trigger Guard

This step is relatively easy. You now have the choice of building the trigger guard, modding it, or just going with out it. If you chose to go without it, read all the image notes to make sure you do what you need to. Move on to step #5.

Step 5: Left Panel

Picture of Left Panel

Now, build the left-hand panel,and place it as you see in the pics. This step is just as easy as step #4, so you should not have any questions, but, if you do, drop me a note. Once done, move on to step #6.

Step 6: Stock

Picture of Stock

In this step you will be building the stock. It should be easy to build, but this is another place where you could mod the Reliable. Change the stock to to fit your preferences. I built it this way, you can build it a different way. Again, if you have questions, I am here to help. As always, once you are done, move on to step #7.

Step 7: Sights

Picture of Sights

The sights are also another way that you could mod the Reliable. Make them the way you want them. Also, keep the image notes in mind, as they will help you. Again, if you want help, just ask.

Step 8: Adding Some Extras

Picture of Adding Some Extras

In this step, step #8, you will be putting on rubber bands and lots of other extras including gears and side-panels. It should all be relatively easy, but if not, let me know. Once you are done, we will move on to step #9.

Step 9: The Magazine

Picture of The Magazine

Here are just some pictures of the magazine. And yes, to answer your question, the broken rods are necessary. You can make the mag shorter, longer, straight, or bent in the opposite direction if you want. This might be one of the harder steps, so don't feel afraid to ask questions. Move on to step #10.

Step 10: Finishing Up

Picture of Finishing Up

This is the last step on how to build the Reliable. Essentially what you will be doing in this step is adding bands to the gun. You can use what ever bands work best for you, or what ever bands you have around the house, but in this step, I am using 3 size #64's.

Now that you are done, go and shoot the dad-gum thing.


-The Red Book of Westmarch


wezils tuts (author)2015-05-25

I just built this gun and it is amazing! The only issue that I am having is when I pull the trigger, the mech just gets stuck in pulled position. I added rubber bands like they were in the pics but that isn't the issue. How can I fix this?

CorgiCritter (author)2015-02-12

Ah, one of the first good knex guns I built. It works very smoothly and shoots well.

huntmyster11 (author)2014-07-03

i usually make pistols (just made your five seven and I love it) I plan on building this in a couple days it looks awesome so I hope its worth the pieces!

FlyingFish10 (author)2014-01-04

Great. =D

Lookin' pretty good bro, how does it work for you?

That is possible...

Well, to me, rods are really bad ammo that seem to only work in TRs/NARs. Even in BA guns they jam. They have too many edges and bumps, and are not as smooth as connecter ammo.

ryry2011 (author)2013-10-28

This gun looks way to much like blue mullets sig

Your point?

you basiclly copied bm sig there may just be a couple different things but they look the same.

I thought somebody might say that, and I realize you and BM are real-life friends, but I do disagree, so I will show you why you are in the wrong.

First off, the main body. This is by far the closest resemblance between the two. But, because I did not copy his body (I built it out of my mind), it is just a coincidence. I, again, can see the resemblance, but because my body is like his, and his body is (arguably) a shorted edited version of my ISSC MKII RR (although he did not directly copy it either), your argument falls to the ground.

Secondly, the stock. All mine, not adapted from his, I imagined it and built it all (again) out of my mind.

Anything else? My mechanism is different, my main body is different, my stock is different, my pistol grip is different, my mag is different, my fake barrel is commonplace with a ton of other peoples fake barrels (nobody can claim that they invented it), my back sight is different (my front sight is the same as BM's, his front sight is awesome)... The list goes on...

You really should be more discerning when it comes to K'NEX guns. =D

well you can say what you want to say but in my opinion it looks very similar to bm. and the things that you said in the last comment is miner things.

If that is the way you want to look at it, fine. I just think that if I had e different stock, you would not have said the same thing. All the same, to each his own.

And im just wondering but were is your pistol grip?

The pistol grip is what you might call the handle. I usually call it the pistol grip as that is the precise name for it. Got any K'NEX projects coming up?

im making a safe it not to special but im still going to post it.and after that i think after i might a v2 to my knex wheeler launcher. check it out if you dont know what it is.

Oh, O.K, sounds good.

Element Force (author)2013-10-27

Epic rifle!

TheAwesomestDude (author)2013-10-15

One of the sexiest guns out there, will be building a variant within the next hour or two.

Well, I don't know if I would classify this gun as "smexy" (XD, ahhhh, dr. richtofen), but I do think it looks great. I would love to see what you come up with. =D

will be posting pics in an hour of two

Where are those pics?

sorry my mom did not bring her iPad home but i will post pics tonight or tomorrow

Oh, Oh, my bad. =D

Sounds good.

well i'm all finished with your gun and used NO broken rods, yes even in the magazine I did not used them but came up with a new setup

"smexy" (XD, ahhhh, dr. richtofen)
( ͡° ͜ʖ ͡°)

Triggerhappy101 (author)2013-10-20

whats you're secret to getting a lot of views in so little time? O_o

Well, it takes time. You see, you have to have lots of followers, take attractive pictures, and you have to understand what people like.

I've had hardly any comments on my guns

I commented ;)

cool :D

Well, it takes time. Build a bunch of good stuff, then you'll get views and comments.

everyone starts somewhere... like me!

Well, I did not mean to be mean, I just don't know if I have any upcoming projects... XD Why did you delete your other MP7 'ible? I just don't understand you. You had an amazing KAR98K, and yet you deleted it. You had a really great M4A1, and yet you deleted it. You had a fantastic MP7(A1, XD, you forgot the A1 part. Keep in mind that there is no MP7, there is only a MP7A1), and yet you deleted it. Do you feel okay? XD

Maybe, and maybe not.

nerfrocketeer (author)2013-10-20


CODawesome (author)2013-10-20

cool. the best part of this gun is the stock, with the orange rods, it's realistic. :) The ammo is also very reliable too.

Thankee. Yeah, I really really like that ammo type.

megustatrains (author)2013-10-16

looks cool :D ima make it soon...

Please do, and tell me what you think!

idk i have some other stuff to do and im deciding what to make next out of this, zip2, shahrirs REMPAR shotgun thing, and an intervention M2000

Then, if I were to presume to tell you which gun to build, I would build the REMPAR-V.2.

dr. richtofen (author)2013-10-16

Looks nice, pretty nice trigger. Can't say much more about it, maybe that it's a bit generic (as in no new mechanism etc.)
Good job

About This Instructable




Bio: K'NEX gun builder here at Instructables. More or less retired from the community, but I still pop in now and again.
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