Spartan Armor Systems Level III+ AR550 Body Armor Side Plates Full Coat Black 6x6. Spartan Armor Systems is pleased to introduce our AR550 Body Armor With a 10percent increase in ballistic core hardness our level III+ AR550 armor defeats higher velocity threats such as XM193 M855 and M80 We're special rifle threat validated Our AR550 armor hits the "sweet spot" in the Brinnell Hardness (BHN) range. 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) distancesrepeatedly As with all of our AR550 Armor products we only use the highest grade of AR550 to manufacture our armor Remember not all body armor is created equal Read our FAQ to find out more about the AR550 Armor we use to construct our body armor NOTE: Please make sure you purchase 2 pieces if you need both front and back panels. Specifications for Spartan Armor Systems Level III+ AR550 Body Armor Side Plate: Manufacturer: Spartan Armor Systems Color: Black Quantity: 1 Size: 6x6 Width: 6 in Height: 6 in Fabric/Material: AR550 Steel Threat Level: Level III+ Armor Cut: Standard Weight: 11 oz 2 lb Condition: New Thickness: 0.5 in Coating: Black Hard-Coat Armor Curve: Single-Curved Plate Dimension: 6x6 Plate Size: Standard Plate Application: Side Package Contents: Spartan Armor Systems Level III+ AR550 Body Armor Side Plates Spartan Armor Systems SA-550-6X6-SIDE-PLATE-FC: Level III+ AR550 Body Armor Side Plates Full Coat Black 6x6