Microgun is one from four satellites introduced in CI4. It's a mini-gun.
Fast firing minigun-style satellite. A good all-rounder. Don't let its small size fool you, it packs quite a punch. Unfortunately, it takes a while for the barrels to spin up before it starts firing, so plan ahead. You can tell how much ammunition is left by the length of the belt feeding into the microgun.
It should have great use for boosting inflicted damage to enemies. It has 125 rounds of fire (which deals 100 damage each on Superstar Hero), and can be continuously fired for about 20 seconds, roughly the amount of time the Riddler to overheat.