Heavy Weapons

Heavy Weapons are a class of weapon available to all player classes in Mass Effect 2. Rather than the universal thermal clips utilized by smaller weapons, heavy weapons consume power cells that can be found on missions. The ML-77 Missile Launcher, M-622 Avalanche, and M-920 Cain are researched within the Normandy SR-2's tech lab after the player has acquired enough Heavy Weapons ammunition upgrades; the others can be found during missions.

Heavy Weapon Models
Below is a list of heavy weapon models and their base stats:

ML-77 Missile Launcher

 * Manufacturer: Armax Arsenal
 * Base Damage: 350
 * Damage Multipliers (Armor / Barriers / Shields): x1.25 / x1.25 / x1.25
 * Power Cells: 15
 * Acquisition: Research Project

M-100 Grenade Launcher

 * Manufacturer: Elanus Risk Control Services
 * Base Damage: 500
 * Damage Multipliers (Armor / Barriers / Shields): x1.25 / x1.25 / x1.25
 * Power Cells: 10
 * Acquisition: Prologue: Awakening

M-451 Firestorm

 * Manufacturer: Unknown
 * Base Damage: 15
 * Damage Multipliers (Armor / Barriers / Shields): x1.35 / x1.15 / x1.15
 * Power Cells: 500
 * Acquisition: Zaeed: The Price of Revenge

M-490 Blackstorm

 * Manufacturer: Unknown
 * Base Damage: 500
 * Damage Multipliers (Armor / Barriers / Shields): x3.00 / x3.00 / x3.00
 * Power Cells: 5
 * Acquisition: Terminus Weapon and Armor DLC

M-622 Avalanche

 * Manufacturer: Unknown
 * Base Damage: 50
 * Damage Multipliers (Armor / Barriers / Shields): x8.00 / x8.00 / x8.00
 * Power Cells: 20
 * Acquisition: Research Project

M-920 Cain

 * Manufacturer: Unknown
 * Base Damage: 10,000
 * Damage Multipliers (Armor / Barriers / Shields): x1.00 / x1.00 / x1.00
 * Power Cells: 100%
 * Acquisition: Research Project

Arc Projector

 * Manufacturer: Unknown
 * Base Damage: 400
 * Damage Multipliers (Armor / Barriers / Shields): Unknown / Unknown / Unknown
 * Power Cells: 10
 * Acquisition: Cerberus Network.

Collector Particle Beam

 * Manufacturer: Collectors
 * Base Damage: 20
 * Damage Multipliers (Armor / Barriers / Shields): x1.00 / x1.5 / x1.5
 * Power Cells: 500
 * Acquisition: Horizon (mission)

Upgrades

 * Heavy Weapon Ammo 1 - 7 (Microfusion Array)
 * +15% heavy weapon ammo capacity