This document details the nitty-gritty details about armor certification: https://www.ncjrs.gov/pdffiles1/nij/223054.pdf
Here's a link to the list of all armor manufacturers maintaining a certification for one or more products: https://cjtec.org/compliance-testing-program/compliant-product-lists/ (long load). Alternative link that displays in full-screen: https://www.justnet.org/app/tims/CPLReport.aspx (very long load time)
This document details the nitty-gritty details about armor certification: https://www.ncjrs.gov/pdffiles1/nij/223054.pdf
Here's a link to the list of all armor manufacturers maintaining a certification for one or more products: https://cjtec.org/compliance-testing-program/compliant-product-lists/ (long load). Alternative link that displays in full-screen: https://www.justnet.org/app/tims/CPLReport.aspx (very long load time)