Knex Pistol With Sear System

18,663

23

144

this is a pretty powerful (20 feet with one #64 rubberband)knex pistol i made using the trigger and sear system in a similar way shown in my previous instructable. The red connectors on the back of the gun aren't in the pic but theyre in the instructions.

Pieces:

Rods:
2 red
1 tan (rigid)
8 blue
15 white
26 green

Connectors:
4 white
2 blue
20 yellow
4 green
14 red
2 light grey
2 orange
11 dark grey clips
2 tan clips
2 special black arm things

3 #64 rubberbands (preferred)

Step 1: Body

make 2 of these

Step 2: Trigger System

From left to right:

Trigger, Sear, and safety

Step 3: Handle

enter longer description for this step

Step 4: Trigger Reseter

this is a simple piece that will insure the trigger goes back to its resting position with the addition of a rubberband (later in the instructable)

Step 5: Barrel

sorry it's so bright pretty simple there's only two blue washers, one on either side, and there's six dark grey connectors 3 on either side.

Step 6: Firing Pin

easy

Step 7: Putting It All Together and Rubberband Attachment

READ THIS BEFORE YOU START!!!!!!!!!

For pic 2 and 3 you'll need to attach these pieces (pic 1)where shown dont attach the second dark grey connector yet (it's not letting me put image notes)

In pic 2 the safety is inserted into the (top) half of the gun in the white connector (to the left)in pic 4 put both sides together don't let anything fall out (this may be hard)

Pic 4 shows the rubberband that resets the trigger start from where shown and put the band on the red connectors in the front (you may need to to take the blue rods off by the trigger)

Pic 5,6,7 should be easy and show you where the rubberband for the sear is placed

Pics 8 and 9 show how the barrel is attached with the firing pin in the barrel as well

Finnally step 10 the rubberband on the firing pin (easy)

Step 8: Loading and Firing

to load the gun all you have to do is stick a rod down the front of the barrel (white or green works best) but anything you can fit will do. After you've loaded the gun pull the firing pin back, the bottom of the tan clip on the firingpin will catch the sear and lock in, now all you have to do is pull the trigger(may require a little force depending on the strngth of the firing pin rubberband)and watch it fly.

Share

    Recommendations

    • 1 Hour Challenge

      1 Hour Challenge
    • Frozen Treats Challenge

      Frozen Treats Challenge
    • Classroom Science Contest

      Classroom Science Contest

    144 Discussions

    0
    None
    bballkidx~Meme~

    Reply 7 years ago on Introduction

    for just one band 20ft is okay

    everyone here would love to see it post an instructable for it

    0
    None
    Agorion

    8 years ago on Introduction

    Should i make instructions?
    https://www.instructables.com/id/Simple-And-Effective-Knex-Gun/

    0
    None
    the poodleo

    9 years ago on Step 5

    i am makiong two at a time. please help me

    0
    None
    the poodleo

    9 years ago on Step 5

    yah it kind of annoys me that its this hard. i took two of the handle, and now im still having trouble.

    0
    None
    smegz

    9 years ago on Step 8

    Awesome gun. Added a couple of parts to make it look aesthetic(because I'm a perfectionist)!

    0
    None
    An VillainKevio bro

    Reply 9 years ago on Step 5

    build the killerk pistol with black rods for the body lines, then you will be ready. also, i think it looks better with red connectors for this instead of yellow.

    0
    None
    Yukondano2Kevio bro

    Reply 9 years ago on Step 5

    I couldnt do it, i had to get my dad to force it in, even he had trouble! This thing is wicked. THE CAKE IS A LIE

    0
    None
    Yukondano2

    9 years ago on Step 8

    Quite an interesting weapon. I finished it well. Great design, Fires a decent enough distance.