When it wasn't churning out one mediocre BL manga after the next, manga boom-era DMP would sometimes go out on a limb and license something crazy like this.
BAMBI AND HER PINK GUN (Banbi), by Atsushi Kaneko. First published in 1998 and first published in North America in 2005.
PLOT:
A mysterious email was sent out to every assassin, hitman, and petty crook in the era. There was a little boy stolen by a woman with a pink gun known as Bambi. The reward for him is 500 million dollars, so long as he remains unharmed.
Of course, to get to him they have to get past Bambi. That's no easy feat, as she has no respect for others and no reservations about shooting anyone who gets in her way. Her motives are as mysterious as her background. She doesn't even seem to be all that fond of the kid. All that is certain is that she's going to get him to the old men she keeps talking about, one way or another.