Introduction: K'NEX MSMC

Picture of K'NEX MSMC

Its fun to build the unusual, and the MSMC is definitely unusual. Designed to replace the INSAS AR, the MSMC (which stands for Modern Sub-Machine Carbine) fires an entirely new round, the 5.56x30 mm cartridge. With traits balistically similar to both the SMG/PDW and AR worlds, this gun provides the penetration of most ARs with the size and fire capacity of an SMG/PDW.

That description also fits this K'NEX replica well. In size, it feels almost like an AR, but when it comes to bodily features, it still contains a pistol grip magazine, as well as a rather short over all body. With features like a flip up front sight, an extendable stock, and a high capacity magazine, this gun would be great in an indoor K'NEX war, if perfected.


  • Great sights
  • Flip up front sight
  • Extendable stock
  • High capacity magazine: 10 - 16 rds.
  • Sturdy body
  • Exact in dimensions
  • Comfortable trigger
  • 6 in. + trigger pull
  • Good / average range: 30 - 50 ft.
  • Sturdy magazine

This is my second entry into the COMMUNITY CONTEST: TOY RODS AND CONNECTORS, so don't forget to vote for mine and my brother's entries!

Don't forget to check me out on YouTube, Google +, at my website: The Red Book of Westmarch Insider, and become a member of K'NEX Connect today!

(Don't forget to check out the video embedded within the pictures)


The internal pics are also within the slides, so if you ever get a chance to build this MSMC, give me some pics!

CMPassTime (author)2014-10-19

Thanks For The Internal Pics, I Spent All Day Making It ;P

You are welcome, enjoy the MSMC!

V.2 coming to a website near you!

Yes, yes.

The only best K'nex MSMC ever on instructables

LOL, and currently the only MSMC on instructables. Thanks man!

myOmy (author)2014-07-25

Ughh that stock tho

Whats wrong with it?

Gives no support, and slides back into its normal position(close to the gun) all this is from my standpoint, based on views and different angles, as well as a gun recently posted by someone That used a modded version of this stock to hold its self in a steady position. I'll see if I can find it, it has smg in the title and was entered into the contest. But based on what I can see, this stock slides back closer to the gun when a force is applied to the butt of the stock.

Well, in the first place, its mostly there for aesthetic reasons. "Stick stocks" like that are rarely of any real use. In the second place, you can lock this stock into what ever position you want, its not that hard. All the same, I thank you for your comment, and agree with you that it is not the ideal setup... but then again, it is just a replica, a type of gun not really meant for performance.

Kona-chan (author)2014-07-16

hey Red, nice job on the gun, but here's a lill' tip, try to add a pic of the real deal so people can see what you based it off, And I know you can google it but somepeople(like me for excample xD) are to lazy to do that

just a tip though

still a nice gun xD

Well, I used to do that, but if you do that, you ruin your chance of ever getting your gun featured. LOL, I'd kinda like to get more of my guns featured. Thanks man, glad you like it!

~KnexBuild~ (author)2014-07-09

Nice! I don't think I've actually heard of the real gun before. It must be a new firearm.

Its from Call Of Duty Black Ops II

I don't mean to sound nit picky, but the MSMC is not from BO2, its from India, it is a real gun.

LOL, finally something good from India =P. Nice gun, Red.

Yeah, I know right! I've thought about building your INSAS AR, but never got around to building it. Glad you like it!

I know its a real gun, what I should have said was "it is a gun that is featured in BO2.

Thanks! Oh? Yeah, I hadn't heard of it before BO2, but it is a terrricfically interesting gun.

I looked it up and I found that it is an Indian made firearm. I think it was made in 2006.

Yup, that sounds about right.

sandroknexmaster (author)2014-07-09

Looks good!

Thanks bro! Don't forget to give me a vote!

Apparently, I already have :)

Is now the part where I say "yay" like dr. richtofen, or do I say "thanks?" =D

I prefer "yay" :D

Zombiekiller-93 (author)2014-07-09

Another impressive gun as always, given you a vote and favourited

Thanks man, I really apperciate it!

That's ok, I've have uploaded my only entry for the contest

Your only entry?

I know you can enter up to 3 but as part my of schedule for the rest of this year, its just one instructable a month but I'm just glad I have enter my first contest and quite frankly I don't mind if I win or lose.

Gargamel-Knex (author)2014-07-09


Thanks man! You got any other projects planned for the K'NEX contest? Oh, and also, don't forget to give me and my bro all the votes you can!

Yes :)

I already have a car made of k'nex.
But soon there will be a knexballmachine:)

PS: Voted :)

Sounds good, and thanks man!

dr. richtofen (author)2014-07-11

It looks good and all, like always, but I don''t think it should win the contest.

Thanks man, glad you like it. =D

Lucas The Boss (author)2014-07-09

Dude this is awesome I swear I got to start making guns like this its not letting me enter my KLRBP :( but who cares I wouldent win put up against a gun like this ur awesome favorited and voted

Thanks man, glad you like it! Naw man, we all have our chance, but between you and I (and everyone else on the web who reads this comment) I hope a K'NEX GUN wins this contest, not a ball machine or otherwise. It'd be nice to see some appreciation for us gun builders on instructables, not just the ball machine builders. Don't get me wrong, I have nothing against ball machines, but I am not satisfied with the amount of appreciation they get as opposed to us gun builders.

I know man building guns are a lot harder than it looks fitting a mech in a small body and look good to is not easy i am a little disappointed about the amount of recognition we get but I am like u I have nothing wrong with ball machine builders for I came to this site to build ball machines but I saw you and blue mullet building guns and I decided that was what I wanted to do. I really do hope a knex gun wins though

Yeah, I'm with you there dude. +1 all the way.

didexo (author)2014-07-08

Sweet gun, Red!

Don't forget to give me a vote!

I won't!

I.E. (author)2014-07-09

This is looks really, really good! Nice job

Thanks man, don't forget to give me a vote!

Thanks man, for the vote, the favorite, and the apperciation!

didexo (author)2014-07-08

Sweet gun, Red!

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.
More by The Red Book of Westmarch:K'NEX Rezosu Z65 - 100th Instructable!!!K'NEX ThorncannonK'NEX Fusion Rifle (Prism Schism) + Internals
Add instructable to: