Lego Balisong Knife AKA: butterfly knife by SkyCanvas86 on DeviantArt
Best Lego Butterfly Knife : 8 Steps - Instructables
Working LEGO Butterfly knife | Working LEGO Butterfly knife😲🗡️ Instructions coming soon😃👍⬇️ Follow me for more Brickstealer | By Brickstealer | Facebook
Butterfly Knife (With instructions) from BrickLink Studio