Step 1: Compare Bullet Penetration to Armor Class (The Rule of 10s)
Every armor class requires roughly 10 points of bullet penetration to defeat reliably: Class 3 requires Pen 30+, Class 4 requires Pen 40+, Class 5 requires Pen 45-50+, and Class 6 requires Pen 55+. If your ammo penetration equals the armor class x 10, your first shot has an ~80% chance to penetrate.
Step 2: Factor In Plate Durability Degradation per Shot
When a ceramic or steel plate stops a bullet, it loses significant durability percentage (Ceramic loses up to 22% per hit; Ultra-High-Molecular-Weight Polyethylene loses only 12%). Once plate durability drops below 50%, even budget rounds have a 70%+ chance to punch through.
Step 3: Calculate Thorax Blunt Damage on Stopped Rounds
Even if an armor plate successfully blocks a high-energy rifle bullet (like 7.62x54mmR or .300 Blackout AP), the non-penetrating impact transfers blunt damage directly into your thorax (typically 8 to 22 HP). Taking 3 to 4 blunt impacts will deplete your 85 HP thorax pool and cause death without any flesh penetration.
Step 4: Target Exposed Hitbox Zones (Neck, Armpits, Throat)
Tarkov Patch 0.15 features realistic modular armor plate hitboxes. If an enemy PMC is wearing a Class 6 chest plate, shooting their side armpit or neck bypasses the heavy ceramic plate entirely and impacts only Level 2/3 soft aramid inserts.