Caliber Armor NIJ Certified Level IV Body Armor Package with Modular Overt Defense (M.O.D.) Plate CarrierCaliber Armor NIJ Certified Level IV Body Armor Package with Modular Overt Defense (M. O. D.) Plate Carrier Maximum Protection. Mission Ready Versatility. The Caliber Armor Level IV Ceramic Plates + M. O. D. Body Armor Package delivers uncompromising protection against the most severe ballistic threats. Engineered for those facing highrisk engagements, these Level IV plates stop armorpiercing rifle rounds while keeping weight manageable through