Knex Catapult-Gun Hybrid

Introduction: Knex Catapult-Gun Hybrid

This is a knex gun that uses a firing mechanism that is similar to a catapult. It is pretty small, can fire any length rod, and has a true trigger. The actual power comes from pulling the trigger, not from a rubber band, so the distance it shoots depends on how hard you pull the trigger. This also makes it so don't need to cock it back each time you shoot.

Any comments or constructive criticism (even negative) are appreciated. And please rate it if you like it. Thanks.

Step 1: Body and Handle

Just follow the pictures... Not too complicated.

Step 2: Top Part

This is the part attatched to the trigger that pulls the catapult arm. The last three pictures show how it is attatched to the body.

Step 3: The Arm

This is the part that flings the ammo rods into the air. A little more complicated, but you should be able to get it through the pictures.

Pics 1-3: Show the whole arm from different angles
Pics 4-5: Show two different parts of the arm
Pic 6: Shows how to put the two pieces of the arm together
Pics 7-10: Show how to attach it to the body

Step 4: Rubber Band and Operation

Put the rubber band that keeps the arm back in the following spots. To fire, just stick any size rod in the orange connectors' hole on the arm and then pull the trigger. I've found that blue rods work best as ammo.

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    34 Discussions

    0
    smickel
    smickel

    Reply 11 years ago on Introduction

    No it doesn't. You're probably holding it backwards.

    0
    jayboy2431
    jayboy2431

    8 years ago on Step 4

    not the best range 1-5 ft if you made the barrel longer or a way to make the trigger pull faster it would fire better

    0
    CODKING
    CODKING

    10 years ago on Step 1

    do u wnt me to make all of the picturs or no

    0
    CODKING
    CODKING

    10 years ago on Step 1

    do u wnt me to make all of the picturs or no

    0
    knex_mepalm
    knex_mepalm

    11 years ago on Introduction

    Does this work without the band in response to my question?

    0
    smickel
    smickel

    Reply 11 years ago on Introduction

    Yes, it works without the rubber band, however it won't automatically return to the "cocked" position.

    0
    smattman22
    smattman22

    Reply 10 years ago on Introduction

    add a hopper or something and you've got semi-auto :D

    0
    An Villain
    An Villain

    10 years ago on Introduction

    interesting design, very innovative, 5*. could use a better handle though (fixed.)

    0
    Wafflicious
    Wafflicious

    11 years ago on Introduction

    i did something like this earlier this year. I used dsman's crossbow's ratchet system so it used rubber band power.

    0
    shmi117
    shmi117

    11 years ago on Introduction

    I am currently making a mag for this gun... ill post when i can and if it works out.

    0
    bounty1012
    bounty1012

    12 years ago on Introduction

    it is pretty cool i was making it to destroy a lego castle but it didnt but it is a very good gun. nice idea