NIJ Level 4 protection represents the highest tier of ballistic resistance, designed to shield against a broad spectrum of threats. This rigorous standard is tested by Body Armour, Bomb Suits , Night Vision , NIJ level 4, STANAG, Combat Helmets, NIJ 3A, Military Supplies, Ballistic Plates, Stab Proof Vests & Gloves, Scopes, Binoculars, Plate Carrie