Call of Duty®: Mobile Combat Physics and Cover Guide

In Call of Duty®: Mobile, environmental physics directly dictate whether incoming fire hits you, how explosives travel into rooms, and how long vehicles protect you. To survive high-risk engagements, treat thin structures only as visual concealment, calculate grenade rebounds off firm geometry, and immediately abandon compromised vehicles before they explode.

Bullet Penetration and Surface Material Interactions

Not all cover provides ballistic protection. The physics engine evaluates surface density, allowing assault rifles, light machine guns, and sniper rifles to penetrate lightweight barriers and damage targets hiding behind them with modest damage reduction. Solid masonry and thick metal absorb all incoming rounds.

When engaging an enemy who ducks behind thin partitions or wooden doors, continue firing controlled bursts along their anticipated movement path. When defending, reposition behind dense rock, stone walls, or earth berms before reloading or using recovery items.

Surface Type	Penetration Behavior	Recommended Tactical Action
Wooden Doors & Slats	High penetration with moderate damage retention	Wall-bang retreating targets; never use as healing cover
Glass Panes	Full penetration with initial shattering delay	Fire directly through panes to hit targets without delay
Sheet Metal & Siding	Low to moderate penetration based on caliber	Suppress moving targets using automatic fire
Concrete & Stone Walls	Complete bullet absorption with zero penetration	Prioritize as primary cover during active firefights

Water Physics and Submersion Mechanics

Deep water creates immediate hydrodynamic drag that sharply decelerates incoming bullets, causing surface-level gunfire to lose damage within inches of the water line. Diving into open water provides effective emergency protection when you are caught without physical land cover.

Submersion introduces strict combat limitations:

Zero Weapon Discharge: You cannot fire primary or secondary weapons while swimming underwater.
Resurfacing Vulnerability: Breaching the surface triggers a brief movement reset and delays weapon readiness, leaving you exposed to shoreline ambushes.
Safe Traversal: Swim beneath the surface along underwater terrain contours to break line of sight, and resurface only next to solid shore barriers rather than exposed beaches.

Grenade Bounce Angles and Ballistic Arcs

Lethal and tactical throwables adhere to firm surface friction and consistent deflection angles rather than rolling loosely along slopes. Fragmentation grenades and concussion equipment rebound predictably off solid geometry.

Apply these deployment practices to clear fortified rooms:

Bank Ricochets off Hard Angles: Throw frag grenades at a 45-degree angle against interior walls or door lintels to direct the explosive into blind corners.
Clear Window Sills: Target the upper half of window frames so the throwable clears the opening cleanly without clipping the ledge and bouncing backward.
Cook Low-Wall Airbursts: Hold fragmentation grenades before release so they detonate immediately as they cross low obstacles, eliminating reaction time for players behind cover.

Vehicle Momentum and Detonation Hazards

Vehicles carry kinetic momentum through environmental clutter, crushing light obstacles and dealing fatal damage to infantry directly in their path. However, incoming weapon fire rapidly depletes structural integrity.

When a vehicle's health reaches zero, it triggers a localized explosion that instantly eliminates nearby players, bypassing remaining armor plate levels. If your transport catches fire and smokes heavily:

Exit the vehicle immediately and sprint away from the chassis.
Never crouch behind a burning vehicle to heal or reload.
Reposition behind natural stone or terrain berms to continue the firefight.

Structural Glass and Sound Detection

Intact window panes cause slight visual refraction and absorb a fraction of an initial bullet's velocity before fragmenting. Vaulting through an unbroken pane also triggers a distinct, high-frequency shattering sound and introduces a minor animation delay compared to vaulting through an open frame.

Defensive Preparation: Break glass panes in advance when holding a building to ensure clear line of sight and eliminate velocity penalties on long-range sniper shots.
Stealth Breaches: Shoot or melee glass from a safe distance before moving in, or enter through open doorways to prevent alerting nearby defenders.
Auditory Tracking: Treat glass breaks as reliable perimeter alarms to locate opponents attempting to enter the structure.