Revolmon

A mutated Digimon whose body has become a gun barrel. Although the details of how it was born are completely unclear, it has a deep sense of justice and acts as a "Virus Buster". The "Virus Busters" exterminate the spirit of "Evil" possessed even among Vaccines and especially by Viruses, and are Digimon who have the ability to Delete. Also, it has another side that loves gambling, and since it really loves Russian roulette, it is likely to overlook even a Virus Digimon if it can get through Russian roulette, and is unable to hate them for a little while.

(Source: Wikimon)