Introduction: Ultimate M4 Barrel

Picture of Ultimate M4 Barrel

This is almost exactly the same size as a real one and it can be used on a working gun. The red connectors prevent it from collapsing.

I've decided to make my own M4 to go with this barrel. You can still attach it to your own, just give me credit for it if you post it on a slideshow or instructable.


Sharir1701 (author)2011-10-19

with mlcad sorry for late reply. search mlcad knex in google and there should be alink to an 'ible about it.

knexpete (author)2010-09-07

I'm making an M16A4 and'll probably use this hadguard, but my initial design tells me that the handguard needs to be bigger... Any ideas on how to extend it?

Chikara (author)2010-06-13

ima put this on an untangle. i destroy and rebuild the untangle so much that my fingers start to lose feeling... this barrel looks easier on my fingers.. D:

heatblast (author)2010-04-11

Pretty good........ pretty good. VERY original. Not bad at all. 4 stars, and good night to all :).

barrax (author)heatblast2010-06-06

not that original

barrax (author)2010-04-13

this is just an interesting take on mine (sigh, and motabois) M4 barrel...

but nice also..

Oblivitus (author)barrax2010-04-13

Oh wow, I just looked at yours and didn't realize that there was one so similar, I'd never looked at the structure before. This one's still a bit better though.

barrax (author)Oblivitus2010-04-14

the main reason is better is because its wider, and the hole in the middle can easily fit a bullet, where mine was a tighter squeeze...

sniper crazy (author)barrax2010-06-04

plus Oblivitus` is easier to connect to a barrel and the connections arent flimsy;what i mean is if u took long grey rods and put them down the 4 holes in the middle of the half snow flake connecters u can easily add a snow flake to the end of it with a better connection and it looks better because the barrel isnt tilting downards

barrax (author)sniper crazy2010-06-06

i think mine suits an M16a3 model better also, to put this on my m4 would make the rest of the gun seem smaller.

erikos kostarikos (author)2010-04-15

I like it, but there's one problem: How can you attach it to a gun?


 Maybe more on a crappy way XD.

MotaBoi (author)2010-04-10

 I see one problem.... how would you attach it ?

Oblivitus (author)MotaBoi2010-04-10

It would be tricky.


May I add those pictures to the slideshow?



Nice, how does it fire?

Fires great a good 45-50 feet.


I destroyed it 2 hours ago for my mp5 v2. The gun already is done now to mod it.


not to hard you could fit to ypurs if you realy wanted

 nah... lol
I think mine is good enough as it is.... and I already broke it

yeh i know you broke it but i like this cus it has a slightly larger hole in the center

Tom Buckey (author)MotaBoi2010-04-10

Also... What would the firing pin look like?

Oblivitus (author)Tom Buckey2010-04-10

A regular firing pin.

Tom Buckey (author)Oblivitus2010-04-10

I know that but trigger and  the end of the pin. The bit that you grab onto that you pull it back with.

asdfda3432 (author)2010-04-12

Nice looks of the barrel.

bounty1012 (author)2010-04-11

its a four-barreled sawn-off shotgun.

gtrain (author)2010-04-11

i think i might use it some day, looks great!

~KGB~ (author)2010-04-11

epic! 5*

Merugop (author)2010-04-11

 It's a nice barrel but it uses like a thousand yellow connectors. 4.5 for the attaching only

builder968 (author)2010-04-10

Awesome! The only problem is the hard way to attach it.

Seleziona (author)2010-04-10

Looks good!!! 4.5*

Mr. Muggle (author)2010-04-10

would be very difficult to make a gun that could sling a rod precisely trough that hole because it's so difficult to attatch but it looks awesome!

knexsuperbuilderfreak (author)2010-04-10

hmm i like

MotaBoi (author)2010-04-10

 nice :)

Senior Waffleman (author)2010-04-10


bounty1012 (author)2010-04-10

Desperado gun anyone?

KnexFreek (author)bounty10122010-04-10


KnexFreek (author)2010-04-10


Oblivitus (author)2010-04-10

Yes, you could use it for that too.

MegaMetal8 (author)2010-04-10



About This Instructable




Bio: I paint, write music, and used to build knex guns. I have a Bachelor's Degree in Studio Art. - updated 5/7/2014
More by Oblivitus:Z3 Knex Gun (3-Barreled Semi-Auto Pump Action Revolver)Z3 Knex GunZ3 Knex Gun Firing Demonstration
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