Best Ceramic & UHMWPE Body Armor: Level 3 & 4 [RMA, …
· Level III. However, this is where things get a bit tricky. While Level III plates do usually stop various lead-core 5.56 NATO cartridges, depending on the construction material, they may fail against cartridges with mild armor piercing properties.. Pure poly-ethylene plates, for example, will most likely fail against M855 "Green Tip" 5.56, while M193 may succeed in penetrating steel armor ...