Knex Pistol With Mag and Shell Ejection




About: Name's Drew. I like to build knex guns. I'm not very good at it. I tend to build simple guns. I'm not very innovative, I've tried but never ends up well. So I build guns I enjoy handling and shooting. Would...

First off, This is not completely my gun. I found it, I built it, and I modified it. Credit for the trigger mech goes to Karma Charger18 who also named it. This gun is called R45-S. This gun has an ok distance of 10-25 depending on rubberbands, it also has automatic shell ejection. Oh and this is my first Instructable!!!

Shell ejection.
Very sturdy.
Alright distance.
Comfortable design.
Ammo pusher thing doesn't put a lot of stress on gun.

Shells jam sometimes.
Bullets jam in barrel sometimes.
Firing pin out stress on back of gun.

It's always good when there are more Pros then Cons!!!


Step 1: Handle and Trigger

Kinda simple step. If you need more pictures or instructions than this, Just tell me and I will see what I can do.

Step 2: Body of the Gun

This is just the body of the gun. Don't get confused by the different colors of the pieces like I do. lol

Step 3: Magazine and Part of the Body

This wil be the magazine. The ammo it holds it blue rods with 3 grey spacers taped together as the shells. Again, if anyone needs more instructions or pictures than just ask and I'll see what I can do.

Step 4: Putting It All Together and Making the Ammo.

Here you will put the gun together and make the shells you will use. Please pay close attention to the photos because I changed some things in some photos.



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    14 Discussions


    1 year ago

    how do u even use this trigger


    2 years ago

    put more instructions please

    ya i agree its a cool gun good idea to it but reloading is just a huge pain X.x seems more of a gun to use the clip and drop it and go type of gun.


    5 years ago

    Going to make it now looks awesome! :)

    cool knex13

    7 years ago on Introduction

    Thanks I have just finished and it is really good but there is a problem.
    It take a long time to reload but other than that it is really good!
    Also on step 3 it is really hard to understand how to make the ammo holder.

    1 reply
    Drew99-KGBcool knex13

    Reply 7 years ago on Introduction

    Thanks, I knew that the reload time was bad but I think you could do some mods and make a removable mag. I dont think it will looks as good though.
    You built it right? Cause if not I can make better pics of the mag.


    7 years ago on Introduction

    Yeah sorry, I updated my model but then I took it apart before I updated it so you can chose between the original trigger and Karma Charger18's trigger. They will both work. Sorry bout that.


    7 years ago on Introduction

    Thank You. Credit will be given to you and that sounds like a good name, I'll call it that. I also added a thing between the handle and mag to make it sturdier. It's the yellow stick on the bottom.

    2 replies

    Add this into the handle to remove the need for trigger bands. At the moment you're just using the standard y-clip barrel trigger.


    Oh, and use my anti-elastic trigger mech if you want, it will fit this gun!
    Remember to give me credit though :).