Mods

 '''!!!This page is based on update 6. Update 7 will be removing Mods from Warframe. They will be replaced with a new system!!!''' Modifications (or "Mods") can be added to Weapons and Warframes to make them more powerful. They can be obtained through enemy drops. They can either be equipped to their respective device or sold in the inventory for credits.

Mod Details
Mods have minimum level requirements. The frame or weapon must have at least the given level before it can be equipped. Mods are generally broken up into 5 catagories: Warframe, Rifle (also works for Sniper Rifle), Shotgun, Pistol, and Melee. Many mods are frame or weapon specifice. That is, they will name an individual weapon or frame they can be attached to. The " 'Excalibur' Mod" can only be added to the Excalibur frame and no other frame. The " 'Skana' Mod" can only be added to the Skana and no other melee weapon.

Warframes have 4 mod slots and can be supercharged with Orokin Reactors/Catalysts to have more (generally 13). Weapons have 3 mod slots but the total when supercharged varies depending on the weapon type. When supercharged, rifles (including shotguns and snipers) have a total of 5 mod slots, pistols have a total of 4 mod slots and melee weapons have a total of 7 mod slots.

Equipping mods costs credits. This cost ranges from 200 to 750 credits for a single mod to be added. More mods added at the same time does not give any discount. Mods can be removed at no cost. Mods will stack their effects within the same weapon/frame. Loot Radar will have farther range; elemental damage will increase; stun chance will increase; shield recharge will be faster; when you have multiple of the same modifier mods (values can be different).

Mods have a color code to identify rarity. The name text will be a different color based on how rare it is. White mods are common, Green mods are uncommon, and Blue mods are rare. Generally, the higher level missions will have better mod drops. Heavy units (Grineer Heavies, Infested Ancients, and Corpus Shock Moas) are more likely to drop better mods, and Bosses always drop mods. Rarely, mods will have 2 different kinds of abilities. These are sometimes green mods, but generally Blue mods. The more rare or powerful a mod, the more expensive to equip and more profitable to sell.

Elemental mods on melee weapons will also give a visual effect on the weapon while on a Tenno's back as well as the target they hit.

Trivia

 * However, there seems to be some slight exceptions, whether it is intentional or not, but Dual Heat Swords can use Dual Skana mods, and the Braton Mods can be used on the Braton Vandal.