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