Introduction: K'nex Pump Action Rifle Code:OSNJCKMA2

Picture of K'nex Pump Action Rifle Code:OSNJCKMA2

This is my third K'nex assault rifle. The name comes from the fact that my brother james wanted a gun as well, so when I pounded him with my other gun, he could retaliate (Oh shit, Now James Can Kick My Ass Too!)

Interesting features:
10 round side-loading mag
Vertical pin blocker (for firing pin)
Sliding trigger

Step one has been completed, Feel free to comment on that. I make it with mlcad, but I havn't gotten the povray conversions to work, so if anyone else want to give is a whack, let me know.
Has pretty good instruction videos, but he doesn't mention me on the site. The license I released the gun under require attribution, so yell at him to give me some credit or I'm going to have him shut down. :) (blogger and both respect DMCA takedown notices)

Step 1: The Hopper

Picture of The Hopper

The hopper of this gun is a solution to the problems I had with my 2nd gun. I jammed, BAD. Not often, but when it did, you needed to darn near take apart the whole front end to fix it. That and the fact it took un-godly amounts of time to load (20 rounds, drop in). With this system, ALL of the rounds are accessible at any time, and can be placed properly with much more ease. Both sides open, for both lefties, and righties, and both snap closed securely with no wonkey cut up pieces.

Some of the pictures are of a out-of-gun replica built for better visibility.

Step 2: Firing Pin Control

Picture of Firing Pin Control

The control pin for the firing pin. This pin sits perpendicular to the firing pin and drops in front of it when the gun is cocked. When the trigger is pulled, it moves out of the way and allows the firing pin to pass.

Pictures taken with a out-of-gun replica.

Step 3: Sliding Trigger

Picture of Sliding Trigger

Nothing really special here, but I don't believe anyone has used this design yet, so here it is. The trigger slides rather than pivots, which has a more solid feel. It is linked to the firing pin control pin through a few joints that can be seen in the main picture. Feels kinda like a Super Soaker trigger.

Picture taken on an out-of-gun replica, again

Step 4: Make the Side Walls

Picture of Make the Side Walls

This gun's support is all in the side walls. You will need to make two, one for the left, and one for the right. They are identical, with the exception of one mirrored part (the red piece needs to be on the outer side of both. Just copy the pictures.


ProtectTheAlphaWolf made it! (author)2016-06-28

I made it and it works but only short range on it.

Knex.X (author)2012-10-25

Ah.... them good ol' times.

knexboy959 (author)2011-10-16

Its stolen

SonicX 22 (author)knexboy9592012-01-11

Might wanna check the dates pal, like how The Jamalam kept telling everyone...

cecil_love (author)2011-11-28

please help me on how to download songs from itunes for free and how to do it successfuly.i dont know how to do it. i want to tranfer songs to my usb,i have my account here in instructables. i watch a teps on youtube on how to tranfer music files to my usb he says that all i need is itunes acount and usb how to got an itunes music here in my account in instructables? i need ur advice.thanx

knexinventer (author)2011-09-13

why didnt you finnish this gun?

zchan1120 (author)2011-06-08

WHAT IS A P90?!?!?!?!?!?

spazgadget (author)zchan11202011-09-05

A type of gun. Google it.

yeah yeah (author)2010-08-03

you stole this pumpaction p90 from a website

DJ Radio (author)yeah yeah2011-07-28

Did you even look at the post dates? This is the original. All other posts of this gun are stolen from this.

Fred the evil puppet (author)2011-02-22 has the ibles in video.

The Jamalam (author)2011-02-07

He also called the gun a P90, which is just a shame.

Kaiven (author)2011-01-01

Ahhh memories. I remember building this years ago. Very good gun, one of the best I made. I'll favorite it just for the memories.

mahmel (author)Kaiven2011-01-10

So am I, I think this is my first gun I've builded! ;D

Kaiven (author)mahmel2011-01-10

K'nex is the best childhood toy.

babygotback (author)2010-08-24

how far does it go

ultimachris (author)2007-11-14

dude please make the next step cause i've been waitin' for six months

Cartuner55 (author)ultimachris2008-03-21

koolkidd made an instructable to finish it

sampson111 (author)Cartuner552010-08-09

thanks now i can make it

mini grant (author)2010-06-21

it looks like a p90

nala beamer (author)2010-04-20

did you steal  tht knex gun from weelby?

nala beamer (author)nala beamer2010-06-15

hey weebly how old are you? and do you know any great places to but knex becaause i need more cux i built so many guns and have no more ammo because every gun i make shooots blue rods

JB123 (author)nala beamer2010-06-02

its weebly, and im pretty sure he did

todo and tido (author)2009-05-18

this isn't his!!!!! go on youtube and type in "knex pump action shotgun" its by knexguntutorials.

DrWeird117 (author)todo and tido2010-06-05

No, this is his. Knexguntutorials just made a tutorial of it.

ash1494 (author)todo and tido2009-08-07

You fail

DJ Radio (author)ash14942009-08-11


NYPA (author)todo and tido2009-07-23


DJ Radio (author)todo and tido2009-07-18

check the post dates of this gun and knexguntutorial's videos.

Knexguntutorials steals stuff! so there!!!!!

Drewzer667 (author)2007-12-11


If you want to finish it just look at the first picture of the whole thing you might be able to figure it out.

dylan1234 (author)2010-04-20


Blackbird17 (author)2009-07-03

im moded it. I made it about ten times more powerful

TigerNod (author)Blackbird172010-03-26

Just like I did, lol.

smattman22 (author)Blackbird172009-11-04


Blackbird17 (author)smattman222009-11-08

 I basicly had to rebuild the entire gun from scrach.  just to have the yellow fireing rod be red....

~Aeronous~ (author)Blackbird172010-03-02

KNOW ALL you have to do is make it gray. ill do that.

I_am_Canadian (author)2008-03-30


smattman22 (author)I_am_Canadian2009-11-04

 since you do i must build it!!!!!

psharpep (author)2009-07-02

Nope it's a P90 Submachine gun.

joebo haha (author)psharpep2009-08-18

yep FN p90

ash1494 (author)psharpep2009-08-07

it's a shotgun actually that happebns to look like a p90

DJ Radio (author)psharpep2009-07-06

Its a combo.

DJ Radio (author)2009-08-11

Hey man, are you gonna post pictures of the pump?

TigerNod (author)2009-07-22

Not really, there are a lot of differences. I understand why you think its from halo however.

Perfect Duck (author)2009-07-15

Were you aware that there's someone trying to make money off of your creation? See for yourself.

DJ Radio (author)Perfect Duck2009-07-18

someone should sue that guy.

psharpep (author)2009-07-02

Cool it loosely resembles a P90 sub-machine gun!

tysanio (author)2009-05-27

dude nice gun man but i need the rest of your plan guns im visual and i dont understand dude need your help

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