RX-77-3 Guncannon Heavy Custom

The Federation's prototype RX-77 Guncannon was designed as a heavily armed support mobile suit for its' brother units RX-78-2 Gundam and RX-75 Guntank. Over the course of the One Year War, the Federation created variations of the Guncannon to be outfitted for specific roles. The Guncannon was revamped into several designs, one of them being the Guncannon Heavy Arms Type. Although it is simply an external update to a normal Guncannon, it was proven a great success and fielded for combat on Earth.