Introduction: Zip2 Independent Dual Barrel Pump-Action Knex Gun Preveiw

Picture of Zip2 Independent Dual Barrel Pump-Action Knex Gun Preveiw
Yes, it is here, Zip2 has arrived!! I'm also happy announce to gun engagement outside the shooting range. That's right Zip recently proposed to Competitor so, this is their direct offspring of the newly weds Zip2.
Since Zip is now a married man (or woman?) with competitor, Zip2 has zero broken pieces. Zip2 features dual barrel design held snugly between two layers. Each barrel has it's own firing mech and trigger, so there is a little learning curve to shoot this thing. The pump is directly related to the design on Zip, smooth and effortless with one #64 on each barrel. The part I love most about Zip2 is the concept (thanks to a question I received about Competitor AR) shooting twice per pump is extremely beneficial. Why? Because this allows a higher rate of fire. It also gives you a "failsafe" so if one barrel jams you can still go on warring. I originally designed this gun to be an outdoor war gun and unfortunately my aim was a little high. As you can see I built this to handle more power than Zip, but I forgot to account for the rod that connects the pump to the device that pulls back the ramrods....{palm to forehead}  Anyway, to say the least I am extremely pleased with how this turned out. I really took my time to prototype and then single it down to a final design. This gun will dominate the indoor battlefield and will be a prize of my arsenal for months to come.....


30ft range with one #64 rubberband
great rate of fire
smooth pump action
solid construction
easy to load and use
comfortable stock
triggers are solid

pump ramrod connection weaker than prefered
rarely jams (depends if you're trying to film it....)
three round magazine (so six shots total)

Step 1: Old Guns

Picture of Old Guns

So I have these two lying around still so I was wondering is anyone interested (other than me)? I plan to post these two eventually but you know how my list goes... to many previews, not enough posts. I will start posting soon (mainly because I'm really low on green rods and almost out of yellow connectors) so if you have preference on which gun comes first I'd like to hear about it. Thanks for looking!  JonnyBGood


OZKNEX22 (author)2013-09-29

Hey there, im wondering how you can load this gun with out a video for help (slow internet) :/,anyways please replay back ASAP!! Thanks. (Btw i build this gun and it is amazing 5*)

JonnyBGood (author)OZKNEX222013-09-29

Picture one shows where the two holes are where ammo should be inserted.
Picture two shows two partially inserted yellow rods. To finish loading, continue to push the yellow rod in until you here a click. Repeat two more times.

JonnyBGood (author)JonnyBGood2013-09-29

Almost forgot the pictures..

JonnyBGood (author)OZKNEX222013-09-29

Sweet! Glad you like it! Anyway to load the gun ammo is inserted throught the top. It's kinda hard to explain in words so check out the pictures.

*sigh* Oh goodness, I can die and go to heaven. Finally, a pump-action gun that I really like. This is really well done, but I have just a few questions.

First off, doesn't the pump need to be a bit more... "round." Is it very comfortable? To me it looks like it might be hard to pump.

Secondly, when you pump the pins, how sturdy is the rod-connecter-rod connection between the pump and mech? It looks like it might need to be thicker/taped.

Lastly, where is the mag? How many rounds can Zip2 hold?

Thanks!! I'm really thrilled that you like how this turned out! =D =D
Alright now for your questions:

The pump is comfortable for me, it may be a bit "spiky" with the pertruding blue rod reinforcements but overall you don't notice it to much. I think the pump feels just fine as is.
Ah yes, the pump and mech connection. If you read my long paragraph I admit that is the only flaw with my design. It can handle two #64's (one on each ramrod) but other than that it can't do much more strain. I plan to improve that part eventually... One rubberband is giving about 20 to 30 feet of range, so I'm pretty content with that(for now)
Lastly the mag is styled similar to Zip, so a nonremovable hopper. Yes, it is suckish, but it keeps the width from getting out of hand and gravity is a very effective pusher.
How many rounds? I did state in my cons that it only hold three (or six counting two barrels)

Any other questions?
Please check out the video I just added, it may answer anymore questions you may have.

All well and good. I would say that you should try to make removable, larger, magazines, but I think you know that. Other than that, it sounds good! I need to build a pump action gun some time........ My sister has tried and tried to get me to make one. I just tell her no, and then she slaps me. (I'm kidding about the slapping part)

XD XD Lol! Th... That's sounds so funny!!! Ahhh you have a creepy sister man! First the creepy doll... Now physical abuse! XD ROFL

XD.I'll see about a removable magazine. My little brother loves my pump action guns, this one not so much. (Too long for his arm!)

I saw the video, this gun is pretty great. Now all you have to do is make it better... and stronger... and better.

I just modified it for a little more strength. It now can hold to rubberbands per ramrod. To tell the truth though, I'm perfectly happy without a magazine. So it's not quite a priority to add. You'll know why when you try a pump action.

Good, good. Well, if you are happy with the magazines, don't let me say anything against them. =D The only reason I said that is because seeing Sharir shoot his REMPAR-2, and seeing him empty that mag that fast was pretty incredible.

Yeah, REMPAR-2 is pretty boss. The rate of fire is always grest on pump-action guns. Mainly because the form is so convenient and ergonomic. My gun experiments with a even faster fire rate with two primef barrels each pump.

Thats all true.

E Pluribus Unum (author)2013-09-20

Wow, not bad.


JonnyBGood (author)2013-09-19


hunter999 (author)2013-09-16

Epic gun dude, keep it up! Love that barrel :)

JonnyBGood (author)hunter9992013-09-16

Why thanks! One of a few comments that had nothing to do about the pump. Just kidding glad you like how this turned out.

JonnyBGood (author)2013-09-15

Well, I could, but the competitor familly wouldn't like that to much.
You can do that though.

JonnyBGood (author)2013-09-15

Please do! If you do end up building any zip, could you do a review?

True, true. I would do that, but since he did not want to use any broken rods, it makes sense.

DarkOwlProductions (author)2013-09-14

That is just freaking sweet. i would've built it if I still had my K'nex. I can still favorite this, though. :P

you don't have knex anymore?! D:

megustatrains (author)2013-09-13

no cut parts? :D is this the same mech as the first? or better? it looks great :D

JonnyBGood (author)megustatrains2013-09-13

The mech on this gun is better and stronger than the original Zip. My prototype FollowUp used the original zip mech, but it required six hinge joints! This gun doesn't use a single hinge joint.

megustatrains (author)JonnyBGood2013-09-14

well hinges aren't really a problem for me cuz i have like 20 of the pairs (40 parts!)

and np :D good gun, hope to see this posted soon

JonnyBGood (author)megustatrains2013-09-14

Expect this gun to be posted this week. If it isn't, please bug me about it. I'm still working out a couple of glitches in design (mainly being that dumb connection from pump to the ramrods). This gun has power I just want more.

megustatrains (author)JonnyBGood2013-09-15


nerfrocketeer (author)2013-09-13

This is cool! Great to see you coming back to a good idea! The paragraph has some strange analogies though... :$

JonnyBGood (author)nerfrocketeer2013-09-13

Glad you like it! It ain't my intro unless it has some sort of story right? Sometimes I do wonder where I come up with these ideas though...

nerfrocketeer (author)JonnyBGood2013-09-14

Haha yeah... :P

JonnyBGood (author)2013-09-14

Oh yeah, this idea was 100% a product of that question you posted on competitor AR. I was having a dry spell of goof ideas and that was the spark of my week project. Since you gave me the idea I decided to make it zip2. (Since you were looking forward to the original.)
Unfortunatly I don't normally do pirece counts but I think this thing uses just as many y clips as the first. I'll see about doing that when I make the ible.

Anyway thanks for the inspiration! I'll get to work posting this thing when I can (give me a week).

JonnyBGood (author)2013-09-13

Glad your impressed! You had a great idea, just needed a gun to go with it. I was online while building this, did I miss a comment?

TheRacker (author)2013-09-13

Could you just make it three layers and only shoot one shot to save parts?

JonnyBGood (author)TheRacker2013-09-13

I could. I could also have made this with a shorter barrel, but it increases accuracy. I mainly made it dual barreled for a better fire rate. I also don't have a problem with pieces, so I ussually go the extra mile.

TheRacker (author)JonnyBGood2013-09-13

Oh ok then. You'll probably get better range with as short of a barrel as possible though, because then you're getting rid of friction.

JonnyBGood (author)TheRacker2013-09-13

Yeah, I know about the friction. My prototype was successful but it showed that with a shorter barrel it produced a shotgun like flight pattern. I admit I have a horrible shot, but I couldn't hit things five feet in front of me with a shorter barrel because the yellow rods where spinning like a helicopter in mid air.

The longer barrel allows the rods to tumble end over end which is more accurate than spinning helicopter like.

TheAwesomestDude (author)2013-09-13

I knew there was another one coming! Yay! *dances*

Is that pump handle even comfy though? Other than that it looks like a solid nice build

Thanks! Glad you like it enough to inspire dancing!

The pump is comfy to me but everyone seems to think that's an issue.

dr. richtofen (author)2013-09-13

It looks awesome. Great that it doesn't use any broken pieces. Maybe you could put two pin-thingys from the pump holder to the part that connects to the rams, to make it sturdier.
Cool gun

JonnyBGood (author)dr. richtofen2013-09-13

Thanks! I was thinking of a similar fix myself. I need some green rods though so I'll probably post something else so I can perfect it.

dr. richtofen (author)JonnyBGood2013-09-13

You're welcome :)
Too bad you're almost out of pieces, the fix wouldn't be too hard I think

JonnyBGood (author)dr. richtofen2013-09-13

That's true, but knowing me I will probably ending up wanting to use pieces I don't have. (of course seven guns, two cars, two rockem' sockem robots, and a few other past projects kind of make this sorta thing inevitable)

I just need to start posting stuff.

dr. richtofen (author)JonnyBGood2013-09-13

Hehehe :p

Knex Lego Maniac (author)2013-09-12

Looks great awesome to hear no broken pieces! I really love how far this gun has come! I am also working on an indoor gun myself! I will want some input and design work help would you like in?

Of course I would like to help out! Sign me up.

Oh, to see it in action check out the video I added.

sandroknexmaster (author)2013-09-13

Looks awesome!

About This Instructable




Bio: Hello. I'm JonnyBGood! I'm a college student who now has a degree in Mechanical Engineer Technology. (MET) (excessively worded to mean a person ... More »
More by JonnyBGood:Borderlands Themed Firefly: AnglerK'nex Mr. MouthZip3 Final Prototype
Add instructable to: