From the YouTube video description: "A 3D animation created in Cinema 4D and After Effects showing how an AK-47 rifle works. Corona renderer was used in order to create realistic materials and reflections. Music is a track from Killer Tracks called "Reassemble" (KT335-8). *Correction: The firing pin does NOT puncture the bullet primer. It just strikes it against the anvil, initiating the firing sequence. "