Introduction: K'NEX Gun: Red Competitor (R4)

Picture of K'NEX Gun: Red Competitor (R4)
Some time ago, JonnyBGood and I were planning on doing a collaboration on a FAD. Needless to say, that fell through. The FAD just had too many weird edges and bumps. Then we thought about doing a concept gun, and decided to mod the flipping snap out of the K2 V.2 (see pic #14). JBG did not succeed as well as I did (not from lack of trying), and these are the pics to my burst-fire rifle, the Red Competitor / R4.

With a 10 round magazine, a ROF of of 4 rounds per second, and a comfortable body and handle, this is one of my most innovative guns.

Improvements over the K2 V.2 include:
  • Comfort (the K2 V.2 was really uncomfortable)
  • Speed (I think that I can pump the Red Competitor / R4 faster)
  • Magazine (the K2 V.2 had a TR8)
  • Piece usage (the R4 uses a significantly less amount of parts)


-The Red Book of Westmarch


akshat21045 (author)2014-05-10

Hey, so I have built the K2 V2, could you guide me a bit into the conversion part? It looks a bit weird...

Hey man! Well, to be honest, I don't know if I could help you. Let me check if I can get internals from my computer... Nope, sorry bro, I don't have any internals. As far as the changes wen't, the body was the most significant. The internals were changed, somewhat, but the body was the most significan improvment.

Ok, thanks for trying.

Ok, thanks for trying.

ryry2011 (author)2013-11-18

dude if you could explane to me why is there a big bullky handle on the side of it.

Well, it is there to provide the user with leverage. If you only had one place to put your hand, you would not be able to operate this gun effectively. BTW, punctuation and capitalization would not hurt you. XD

Well I was typing fast so I didn't care =D

I can relate. =D

DarkOwlProductions (author)2013-11-11

I haven't been on in forever, as my K'nex has been taken away, but is nice to see that the community is continuing without me. Although, I am going to try and figure out something to post eventually. Keep on K'nexing, everyone!

Oh, hey man! Its been a while. I still can't believe that your parents took your K'NEX away from you...

sandroknexmaster (author)2013-11-08

That's huge! Great job!

Triggerhappy101 (author)2013-11-04

i dont get how it works

Well, all you have to do is push the handle / pistol grip / pump forward. It then operates a hammer, which strikes the bullets out of the mag 4 bullets-per-second.

like, one bullet at a time, and 4 per second if you pump fast enough?

Yes. Exactly.

Oh cuz i was thinking automatic but with mag that only holds 10 rounds?...Not likely xD

That is true enough, but all you have to do is extend the mag.

that would have to be a pretty big mag

dragon#1 (author)2013-11-04

nice, saw this thing on youtube recently. is pretty cool. what range?

Thank you. Range? Oh, 15 - 30 ft. max.

nice. pretty good for what it does..

it can always be better. a few little fixes and stuff can get it to 40 ft max mabe and remake it to improve is always an option.

True again. I might rebuild it, but not sure yet. I almost always comeback to my builds.

thats a good thing.

i try but i havent touched my knex for about a few months

Oh, why is that?

been so busy and life.

I can understand that. I do school work (I'm homeschooled) from about 8:30 am to about 4:00 - 5:00 pm, and that leaves very little time for me to do anything else.

i do cyber school. hope to go back into homeschool once again soon..

Oh, that is kinda cool. I can understand wanting to get back to "real" homschooling again though.

yup. teachers away from you teach different than classroom teachers and home schooling

I can understand that.

TheAwesomestDude (author)2013-11-06


JonnyBGood (author)2013-11-04


Whatcha' up to now?

Well... I restarted Thunderbolt but now I'm thinking I need to build a bolt action gun just to prove to myself I can make one. Thunderbolt as you know was my pump-bolt action gun concept. I failed the first time because I had not built a pump action gun or a bolt action gun before. Now I have a lot of pump action experience but still no bolt action experience.

So in a real long way to say it, I think I'll make a bolt action gun now.

Sounds good. Planning on making it without broken pieces?

Yep and with a removable magazine.

Sounds great!

Johnhall14 (author)2013-11-04

Nice=) kinda.....cube like, but otherwise everything looks nice.

Thanks bro. =D

= D(cant add smile to bunny)
(\ /)
( ' ' )
(> <)

Heh heh.

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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