The XM556 Microgun is smaller and lighter than some current 5.56mm belt-fed Squad Automatic Weapons currently on the market but with 4x’s the firepower.
It has much less weight and a smaller footprint compared to the larger M134 electrically driven Gatling gun system. The lightest titanium version of the M134 still weighs about 41 pounds.
The XM556 can be used on vehicles like in place of the M134 and it could be carried by soldiers for short engagements where a lot of suppression fire was needed.
XM556 Microgun Specifications
Caliber: 5.56mm Barrel Length: 10" or 16" Total Gun Weight: 16 lbs* Rate of Fire 2000/6000* Total Length: Handheld 22" Total Height: 6" Total Width: 9" Feed System: M-27 Linked Ammunition Belt Fire Mode: Full Auto Only Power Requirement: 24 Volts DC