Bullet Beetle is the lower-class general of the Planet Insectia, one of the seven secondary antagonists of Fullmetal Alchemist: Reborn and Arachnia's fourth born child. He is modeled after a Hercules Beetle.  

Bullet Beetle
Bloody Herculesfmafnwiki2
Vital statistics
Aliases Bullet Brain, Son
Birthplace Isnectia
Date of Birth Unknown
Age Unknown
Family Arachnia (mother)

Fangs (younger brother) Beautifly (older sister) Waspia (older sister) Lady Bomber (younger sister) Antastic (younger brother) Mothro (older brother)

Affiliations Unknown
Alignment Unknown
Species Insectian
Occupation Insectian General
Rank General
Abilities Gunsmenship, laser vision, mouth beam, flight, super-strength
Power Level Unknown
Weapons Two assault hand guns, razor-sharp claws, spikes and fangs, armor-like wings, communication antennas
Unique Trait Looks like a bug with guns
Goal Unknown
First Appearance Unknown
Voice Actor Unknown
Seiyū Kenta Miyake