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Americans play with guns just like we do with mobile phones, including studying ballistics in our own swimming pool. The results are encouraging, AK-47 in the water, although the principle of water is not compressed, the shell load speed greatly accelerated, as far as the range ~ not mention it ...
The American man estaing a reverse Periscope and a phantom camera, and opened a AK-47 machine gun to the pool to solve the problem of underwater shooting causing the pool to sway and thus affect the perfect shooting.
His experimental results were incredible: the expanding bubbles followed the bullets, blew themselves up and then detonated outward, looking like an atomic bomb exploded, stunning.
AK-47 underwater shooting Experiment High speed Photography (Part 1) AK-47 underwater shooting Experiment High speed Photography (Part 2)