This YouTube video investigates the stopping power of a large sandbox, testing how much sand is required to effectively stop a .50 caliber projectile. The content appears to be a practical demonstration and test of a custom-built backstop, with the creators posing the question of its "bulletproof" capabilities. The description also includes affiliate links to ear protection and camera gear, as well as calls for Patreon and PayPal support, and links to their Instagram page.
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