This is an easy 20min build Knex Gun, with a lot of power and an easy locking method*. It is very compact but still packs a nasty amount of strength! It is not a toy.
You'll need the pieces shown in the picture as well as 3 'standard' elastic bands or some reasonable equivalent. If the gun snaps often you can superglue the parts on. So let's get started!
*The trigger should fall down due to the elastic bands.
1 'hubcap' brown
1 black joint
2 light grey
2 black 'square' joiners
6 blue (4 when using revised version)
If in doubt all will become clear in the following pictures.
Step 1: Construct
Build end of firing rod.
Step 2: Build Firing Rod
Get red piece and add 'hubcap' like so.
Step 3: Finish Firing Rod
Add the parts from step 1 and 2.
Step 4: Build Trigger
Construct - two white rods, two grey connecters, an orange connector and the two black connectors.
Step 5: Handle
Build handle as pictured. If it is too small to fit your hand then adapt one.
Step 6: Main Barrel
Get a NEW red rod and put these on. This is separate to the firing rod. The red connectors are fixed to the red rod in their middle joint.
EDIT: Please look at note (yellow box surrounding blue connector) the gun works better without this blue piece - sorry for inconvenience.
Step 7: Next Part of Barrel
Build this on the other end of the SAME red rod as in last step.
Step 8: Finish Barrel
The barrel should look like this.
Step 9: Add Trigger
Fix on trigger as shown to the barrel.
Step 10: Fix on Handle
Fix on handle as shown.
Step 11: Gather Elastic Bands
You'll need 3 'standard' red elastic bands or good equivalent.
Step 12: Fix on Elastic Bands
Slot the firing rod into the barrel so the yellow piece on the end of the rod is on the opposite end to the black piece at the end of the barrel. Fix on elastic bands as shown in the pictures.