Backup Magazine

The Backup Magazine is a new item in Risk of Rain 2. It gives the player the ability to hold an additional charge of their secondary, or "M2" skill. Unlike, this item does not reduce the cooldown of your secondary skill. This item is the most effective when used with characters with high-damage secondary skills, such as Huntress or Artificer, who can inflict high burst-damage or clear groups of enemies by using their "M2" attacks repeatedly. This item is also powerful with Acrid due to the very short cooldown of his Neurotoxin, allowing him to spread poison very efficiently. Also increases maximum amount of Mines that can be placed down at a time for the Engineer.

Trivia

 * Upon picking up his first Backup Magazine, Commando seems to attach it on the magazine of both of his guns.