1000 rounds of Federal/Lake City XM855BK150 5.56 new SS109 Green Tipped new steel core ammunition, 2016 Production. This is packaged 150 rounds per box, and 3 boxes are included, for a total of 450 rounds. Each round is brass cased, non-corrosive, boxer primed, and has a 62 grain copper jacketed FMJ steel core bullet. It's military designation is XM-855. The brass cases are head-stamped Lake City, and some of the brass case are stamped with the Nato cross, and some of the brass cases are not stamped with the Nato cross. This is currently manufactured ammunition, made in 2016, and each round has the 62 grain, Green Tip, SS109, steel core Penetrator bullet.