This YouTube video features a "Bulletproof testing bowling balls" experiment. While the title and description do not explicitly mention firearms, the act of bulletproofing implies the use of firearms to test the resistance of bowling balls. Without a transcript or further details, it's impossible to ascertain specific firearm models, calibers, or manufacturers that might have been used in the testing process. The primary focus appears to be the durability of bowling balls under projectile impact.
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