Mod

Mods are used to enhance the performance of firearms.

Overview
Every firearm has two mod slots. Adding a Mod Slot Extension or Double Mod Extension augmentation during development can increase the number of slots.

Each weapon type has a separate set of mods, five each for assault rifles, pistols, and sniper rifles, and four for shotguns (five for shotguns in multiplayer, including Chokes).

There are three variants of each mod, one basic and two upgraded. The upgraded mods give a greater benefit at a given tier, but at a cost.

Some of the deleterious effects of upgraded mods are reflected in displayed weapon stats, others are not.

There are certain firearms which cannot be equipped with all mod types. For example, the beam-firing Shadow sniper rifle cannot use a spare clip.

The image of a firearm gives an indication of what mods are equipped. However, exact changes from mods will be specific to the weapon in question. In general:
 * Barrels, melees, and scope mods change the silhouette of the weapon.
 * Magazines and clips change the color of certain parts of the weapon.
 * Chokes, materials, receivers, and stocks give a more subtle change in color.

Mod availability
Weapon mods are available on the same tier schedule as Andromeda Initiative-issued weapons and are unlocked at specific levels. Once a new tier is unlocked, prior tiers will not be found or available for purchase during gameplay.

Barrels
Barrels are mods available for all weapon types. These enhance a weapon's barrel, creating greater gunfire velocity and impact. The increase in damage is reflected in the weapon's stats.

Chokes
Chokes are mods unique to shotguns in multiplayer only. Chokes use adjustable servo motors to tighten or loosen pellet spread for maximum accuracy. This effect is shown in the weapon stats.

Magazines and Clips
All weapon types have ammunition mods, magazines for pistols and assault rifles, clips for sniper rifles and shotguns. Both are mods. Magazines increase the max clip size of a weapon, allowing more shots before reloading. Clips increase the max ammo by adding sockets to increase thermal clip capacity, increasing number of spare shots. The effects of both types are reflected in weapon stats.

Materials
Materials are mods unique to sniper rifles and reduce weapon weight. This effect is shown in the weapon stats.

Melees
Melee mods are mods for pistols and shotguns. A basic melee optimizer's integrated VI improves synergy between melee weapon and firearm computer systems, allowing increased melee damage. Melee damage is not shown in weapon stats.

Receivers
Receivers are mods available for all weapon types. The basic receiver mod uses a capacitor to boost kinetic coil generators, increasing shot penetration through solid objects. Increased penetration damage is not reflected in displayed weapon stats.

Scopes
Scopes are mods available for pistols, assault rifles, and sniper rifles. The basic mod is a simple optical scope which enhances stability while zoomed and increases accuracy while moving. Increased accuracy is shown in weapon stats.

Stocks
Stocks are mods unique to assault rifles. These mods distribute recoil with a sliding system of counterweights compatible with kinetic coil generators. They reduce weapon kickback. This effect is not displayed in weapon stats.

Compatibility
There are nine mod types available for firearms. No weapon type can use all nine mod types.
 * A check mark (✓) in a column implies that the mod can be used by that weapon type.
 * Any mod with a check mark that has an asterisk (✓*) has issues or restrictions. (Refer to the specific mod section in question for details)

Singleplayer
Mods can be purchased from certain merchants, found inside various containers, or on bodies of defeated enemies.

The following merchants sell mods:
 * Bennett Kahele - Taerve Uni, Voeld
 * Boomerang - Elaaden Outpost, Elaaden
 * General Merchant - Common Area, Nexus
 * Mods Merchant - Kadara Market, Kadara
 * Quartermaster Istaal - Resistance Headquarters, Aya

The Mods Merchant in Kadara Market is the best place to buy weapon mods.

Multiplayer
Mods can be found or purchased from the Store in different packs. The basic and upgraded versions of mods from singleplayer are available in multiplayer. However, not all mods are available. (See this table for a list of the available mods.)
 * Basic mods will appear in packs that list mods as a potential item like the Basic Pack or Advanced Pack. Upgraded mods will not appear in normal packs.
 * Upgraded mods can be directly purchased from the Item Store using Mission Funds based on rarity level -, , and.

The Technical Mods Pack has the possibility for an upgraded mod to appear but it is unlikely to happen as there are so many other basic mods that can show up as well as all of the random boosters. It should be noted that it is possible to happen though.

When purchasing upgraded mods from the Item Store, once all of the upgraded mods for that rarity level have been purchased - you will not be increased to the next rarity. If you buy all of the mods, you will not get an  mod. You will only get a random booster. This is a huge waste of mission funds so do not make this mistake!

Mod Restrictions
Certain firearms are unable to use specific mods. If a firearm is unable to use the basic mod, the upgraded mods will not work either. This restriction also applies to all tiers of the firearm in question.

The following is a list of all firearms with mod restrictions:

Assault Rifles

 * The M-37 Falcon is unable to use the receiver mod.
 * The P.A.W. is unable to use the receiver mod.
 * The Soned is unable to use the scope mod.
 * The Sovoa is unable to use the receiver mod.

Pistols

 * The Scorpion is unable to use the receiver mod.

Shotguns

 * The Dhan is unable to use the choke mod.
 * The N7 Crusader is unable to use the choke mod.
 * The Scattershot is unable to use the clip mod.
 * The Venom is unable to use the receiver mod.

Sniper Rifles

 * The Inferno is unable to use the clip mod.
 * The Kishock Harpoon Gun is unable to use the receiver mod.
 * The Naladen is unable to use the receiver mod.
 * The Shadow is unable to use the receiver mod or clip mod.

List of weapon mods

 * Assault rifle mods
 * Pistol mods
 * Shotgun mods
 * Sniper rifle mods

Achievements and trophies
The following achievements and trophies can be earned related to mods:
 * Pinpoint Shot.png Pinpoint Shot

Challenges
Mods are the focus of the following challenges:
 * Equip a New Mod