Step 2: Build the barrel of the gun
Step 4: Biuld the handle.
Step 8: Modifications
1. This is all you need. my knex gun.
2. Then you remove the firing pin. This is also a great time to remove any broken ruber bands.
3. Then remove this grey piece.
4. Then slide this part over.
5. Then put the gray piece back in.
6. Then put the firing pin back in.
7. re-connect the rubberband and your ready to shoot even further than before.
8. This is showing a better picture of it.