Our supplier messed up and sent us 1/2" AR500 instead of AR550 steel. During our QC hardness tests we realized this upon receipt of our order. Rather than scrap this plate, which is still good AR500 steel, we are offering a LIMITED RUN of these 1/2" AR500 targets! These targets will move fast and we have an extremely limited amount of this plate on hand, so grab them FAST. PLEASE keep in mind that these are NOT AR550 and are NOT close range carbine rated. However they still provide an extreme edge to 3/8" AR500 targets. Do yourself a favor and grab on now.