The Blue Destiny Unit 1 featured a GM head instead of a standard Gundam head. Though in many ways similar to its RX-79(G) Gundam Ground Type, GM Blue Destiny Unit 1 was quite a bit different in other ways, particularly in its armament. Similar to the RX-79[G], the Unit 1 featured its beam sabers in the legs and carried the same spiked shield.
However, the single "multi-launcher" on the chest Gundam Ground Type had been upgraded into twin chest missiles and machine guns. Although sporting a smaller generator than the RGM-79 GM, the Unit 1 may have the generator power to use a beam rifle, though it was often equipped with a standard 100mm machine gun. [Source: wikia]
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