Kenichi Sonoda's manga tribute to weapons and explosives that is certainly not without its share of car chases. The name comes from the featured gun shop owned by Rally Vincent and Minnie May who specialize in getting into (and out of) trouble.

Rally Vincent is a gun expert and part time bounty hunter who helps the Chicago Police track down criminals, fugitives, and other miscellaneous bad people. Minnie May is always looking to blow things up, and is never caught without at least some form of explosives on her person.

There are a number of English version manga that are published by Dark Horse and available through Amazon:

There is an OAV, and also "Riding Bean" featuring Rally Vincent and Bean Bandit, though this one is only loosely based on the manga, for instance, with Rally Vincent becoming taller and caucasian.