This is a knex gun that you can make if you don't have many pieces

Step 1: Gather the Pieces

to make the gun you are going to need
handle
2 green connectors
2 green rods
1 blue rod
4 purple connectors
barrel
3 red rods
2 yellow rods
2 blue rods
4 white connectors
1 orange connector
4 silver ends
firing pin
1 orange connector
1 blue rod
1 rubber band

Step 2: The Handle

this is a simple step just follow the picture

Step 3: Barrel

this is a harder step but you can still use the picture

Step 4: Firing Pin

this is the simplest step

Step 5: Put It All Together

hook two of the purples two the blue rods then put the firing pin through the whites and hook the rubber band to the yellows in the front.

Step 6: Shooting the Gun

two shoot the gun you pull back the firing pin and put the orange piece in front of it to hold it back then you put the bullet in though the front and then you push the other end of the orange piece if it doesn't fire good adjust the front and back whites.