Knex Blunderbuss/Ping-pong Ball Shooter




A pretty easy-to-build blunderbuss/ping-pong ball shooter with a new type of trigger-
my first instructable, comment what you think

Step 1: Build the Barrel

The barrel has two rubber bands on the white pieces, across the top and to the other side. You'll see what these are for later.

Step 2: Build the Handle

This is a very simple handle. You can construct your own, the only parts that are really important are the red connectors on top and the hinges on the bottom.

Step 3: Build the Trigger

The trigger uses the track pieces from the roller coaster sets.
They also come in most Knex tubs.

Step 4: The Firing Mechanism

The mechanism that fires whatever you put in the barrel.
You don't need anything to hold the gear on, it should be snug.

Step 5: Attaching the Barrel to the Firing Mechanism

Make sure the barrel has the side without the white piece on top. Then the green rods attach to the white connector in front.

Step 6: Putting It All Together

Taking off one of the red connectors makes it easier to attach the trigger.

Step 7: Bracing the Barrel

Just a little extra support.

Step 8: Finishing the Barrel

This step is NOT NECESSARY, it simply helps the ammo you're shooting go straighter. Make sure the tube is inside all four red connectors in the barrel.

Step 9: Cocking and Firing

Just pull the gray connector on the firing rod back, clip the trigger over the gray connector, load the ping-pong ball, and pull the trigger back to FIRE!

This can shoot almost anytthing you put in the barrel.

WARNING: The gear on the end of the firing rod can come off sometimes. Don't clip something on the end of the rod to keep it from flying off, because then the rod is not flat.



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    38 Discussions

    Meh, I have all of those. And a lot.

    Well I guess I should have taken into account that other people wouldn't have as many of those parts that I do.

    Sorry for the confusion.


    Reply 8 years ago on Introduction

    I'd say, go ahead. It'd be much better then your "mini knex gun" after all.


    8 years ago on Introduction

    Unique idea, even though it is a bit unusual. But at least it is original. I'll build one soon.


    10 years ago on Introduction

    its okay, im not saying its bad, just needs a little work


    11 years ago on Introduction

    what the heck, man, take better pictures cause I really need to build somthin like this and i cant see squat!

    2 replies
    3 and 2chacho5

    Reply 11 years ago on Introduction

    Sorry, I know the pictures are blurry. I'll try to get better pics up ASAP, if anyone has help on taking these with my digital camera it would be much appreciated

    1up3 and 2

    Reply 11 years ago on Introduction

    Most digital cameras have a Macro feature. This setting is usually labeled with a flower.


    11 years ago on Introduction

    I can't build this, your pictures are way too blurry.


    11 years ago on Introduction

    i cant see anythinggggggggggggggggggg!!!!!!!! AHHHHHHHHHHHH!!!!!!!!!!!!!!!!!! plz get better pics =] plz??????


    11 years ago on Introduction

    can we pleaz rezolve this cuz i getting tired of holding down the space key.