When is Gunsmith Cats set, including the Manga.
Me I say it's set between Misfire and Bonnie and Clyde. Why, 3 reasons
1). Rally has the CZ-75. She didn't have that untill the end of Misfire.
2). May is urning over Ken Taki. She dosen't get to see him again untill Bonnie and Clyde.
3). The place is called "Gunsmith Cats". Rally dosen't add the S' to Cats, untill the end of Misfire.
I say that it's pretty certain that the Anime is set after Misfire, but I'm not sure if it's between "Bonnie and Clide" or "The Reture of Gray".
When if doubt, stop and think... "What would Warney do?"