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Answer:
Through its research, NIJ has found that the upgrade kits, tested in conjunction with used Level IIIA armor, experienced bullet penetrations. Excessive backface signatures (BFS) were recorded for all three of the primary threat levels (Levels IIA, II, and IIIA) during this testing. The excessive BFS measurements, along with the bullet penetrations experienced in the Level IIIA armor, would be considered unacceptable if the armor were new and tested in accordance with the NIJ Standard.

• Do the upgrade kits offered with certain models of Zylon®-based body armor ensure the armor's performance throughout the warranty period?
• Has the cause of the Forest Hills (PA) vest failure been determined?
• Now that the Department of Justice has provided findings on the evaluation of upgrade kits, what should law enforcement agencies and officers do if they are concerned with the performance of their upgrade kit and armor?
• What is the Body Armor Safety Initiative and how does it benefit law enforcement agencies?
• When will the Department of Justice complete its testing of Zylon®-based body armor and provide the public safety community with the definitive answers on the performance of Zylon®-based body armor?