In truth, this is just a cool experiment that I wish I had thought to do. After watching the video I had a couple questions that could only be answered by more experimentation. Do the bullets upset the same way as they would when shooting them into a pool of water? What cool footage would we get from shooting an AK-47, an AR-15 or a Perazzi over-and-under submerged in a tank? And what on earth is that finish on the revolver? It looks like a sample from Pimps-R-Us.