CATI® AR600 10x12 Plate Package with Side Plates - SAVE! $250.00 SALE: $175.00. About our Armor: What types of Armor Plate do we use? CATI Armor AR500 Level 3: AR500 Armor Plate is a high hardness (HH) steel used for High Impact Ballistic and Abrasion Resistant (AR) applications.