AR550 Steel Body Armor Side Plates Set Of Two Side Plates 6x6 Base Coat Black. With a core hardness of approximately 545-560 BHN we have found our ballistically rated variant of AR550 that we use is perfect for defeating higher velocity threats while not exposing the armor plate to extreme stress due to forming. With higher velocity rifle threats commonly present throughout the United States we've developed this AR550 armor to specifically defeat some common threats such as 5.56 x 45 XM193 5.56 x 45 M855 /SS109 and 7.62 x 51 (.308 Winchester) at a rated velocity of 3100 fps or less. Additionally we've successfully defeated these threat profiles from Close Quarters Battle (CQB) distances...repeatedly Choose from either 6 x 6 (small) or 6 x 8 (large) Side Plate Weight (per plate): 6 6 approximately 2lbs 9oz (base coat) 2lbs 11oz (full coat) 6 8 approximately 3lbs 6 oz (base coat) 3lbs 12oz (full coat). Thickness: .25 AR550 plus approximately .25 coating makes this slim profile plate overall .5-.6 in total thickness Why Are Your AR550 Single Curve Full Coat Plates Labeled As Level III? Spartan AR550 Single Curve Full Coat Body Armor Plates Are Labeled As Level III On The Back Of The Plate As The National Institute Of Justice (NIJ) Does Not Currently Have A Level III+ Rating. Level III+ Indicates Special Threat Testing And Was Created By The Body Armor Industry To Fill The Void Between NIJ 0101.06 Level III And NIJ Level IV Specifically To Account For High Velocity Penetrator Rounds Such As M855 (AKA Green Tips). While Spartan AR550 Single Curve Full Coat Plates Are Certified As NIJ Level III Rest Assured They Are Made From AR550 Ballistic Steel And Have Been Special Threat Tested To Level III+. Quite Simply The NIJ Requires That We Label AR550 Single Curve Full Coat Plates As Level III Even Though They Are Capable Of Higher Ballistic Protection. Specifications for Spartan Armor Systems Level III+ AR550 Body Armor Side Plates: Manufacturer: Spartan Armor Systems Color: Black Width: 6 in Fabric/Material: AR550 Threat Level: Level III+ Condition: New Package Contents: Spartan Armor Systems Level III+ AR550 Steel Core Armor Body Armor Spartan Armor Systems SAS-55066: Level III+ AR550 Steel Core Armor Side Plates 6x6 Base Coat Black SAS-55066