This is the Australian equivalent of M855 (green tip). Steel penetrator core. Sealed in plastic sleeves for longevity. Excellent ammo, I’ve already shot a can of this. See manufacturer’s page for additional information: http://www.australian-munitions.com.au/wp-content/uploads/2014/07/ARM_AM_5.56-F1-A6-brochure.pdf $500 in Charlotte or surrounding area. No shipping. PM for best response.