This video provides a detailed ballistic test comparing 5.7x28mm and 9mm ammunition against various Level 3A armor panels. The instructor demonstrates that while some 5.7x28mm rounds can penetrate soft aramid fiber Level 3A, higher quality UHMWPE panels effectively stop both 5.7x28mm and 9mm rounds. The test suggests that for general purposes, 9mm may offer comparable or superior performance to 5.7x28mm against common armor types.
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