I have this strange feeling these poor plates didn't pass the green tip test
Either way, level 3 isn't rated for 5.56 regardless
If they do pass, I will be very impressed! If they don't, I have heavyweight ar500 level 4 steel that would do the job.
Not sure where you got the idea that level III it isnt rated for 556. Its just not rated for steel core or ap rifle ammunition. https://nij.ojp.gov/library/publications/understanding-nij-010106-armor-protection-levels