Gun Max, BP-601, is a character that appears in the Brave Police J-Decker series.
Gun Max was originally built to work with the Highway Patrol division of the police, but ran into problems after his partner Kirisaki was revealed to be illegally selling police weapons and confiscated cars. He was transferred to the Brave Police shortly after, and had a rocky start due to his attitude and preference to not work with others, but eventually became a valued member.
Unlike the other Brave Police, Gun Max does not have a vehicle form, instead riding a large motorcycle called Gun Bike, which can combine with him into the Gun Max Armor, allowing him to fly. He can also combine with the Bike to form the Max Cannon, a powerful weapon that can be wielded by J-Decker and Fire J-Decker.