Methods and apparatus are provided for attaching a rigid armor plate to the exterior of a vehicle hull. The exemplary system includes an armor attachment point on the vehicle hull, a hole through the armor plate in alignment with the armor attachment point, and a fastener extending through the hole connecting the armor plate to the vehicle hull. The hole through the armor plate may be larger than the fastener, defining a circumferential gap between the fastener and armor plate. The fastener may comprise a material with an energy absorption capability in excess of 2,000 ksi, and more preferably in excess of 5,000 ksi.