I really love these knives and, after many hours of tinkering, I think I may have invented the best Lego butterfly knife model.
Step 1: The Pieces
This may be a little piece consuming but it looks so much better if it's all black. The blade in the photo is from one of the old bionicle sets. It's necessary for the design to work properly. The rod sizes are (from left to right) : 1x 2:1, 3x 3:1, 2x 4:1
Step 2: Safe Handle
The little piece in between the handles helps create a tighter lock.
Step 3: Bite Handle
The black rod is 3:1
Step 4: Blade
This is a little complex but not too difficult. The rods are 3:1
Step 5: Hinges
The rods are 4:1
Step 6: Connect Them All!
Step 7: Now You're Done!
I hope you had fun building this. If you liked it don't forget to favourite this Instructable. Thanks for reading!