After many requests we decided to see how our AR500 Trauma Plates would hold up against Federals XM855/SS109 Penetrator Round. The results were good =). The plate suffered divots but no penetration! We fired 7 test rounds at a distance of 15 yards. Test video and results can be found here: http://www.ar500armor.com/index.php?dispatch=pages.view&page_id=5