The basics of Level 4 body armor
Level IV body armor plates are rated by the National Institute of Justice (NIJ). This is the highest rating for protective plates. To earn a Level IV rating, the plates must stop a single hit of .30 caliber armor piercing (AP) bullets. They also need to handle multiple hits from lesser threats. Most Level IV plates are made of ultra-hard ceramic materials over a strong Kevlar or polyethylene backing. The ceramic breaks up the bullet while the backing catches the fragments. This advanced design makes Level IV uniquely suited for combat situations with powerful weapons.What materials are used in Level 4 plates?
Level IV body armor plates are typically made using aluminum oxide, silicon carbide, or boron carbide ceramic. These extremely hard materials can shatter and trap high-velocity rifle rounds. The ceramic is often backed by robust, layered polyethylene for added support. Here is an overview of common materials used in Level IV body armor plates:Material | Characteristics |
---|---|
Aluminum oxide ceramic | Hard, durable, multi-hit performance |
Silicon carbide ceramic | Extremely rigid, high hardness rating |
Boron carbide ceramic | Hardest material, expensive, lightweight |
Ultra-high-molecular-weight polyethylene (UHMWPE) | Strong fiber layering, spall/trauma reduction |