Published in the U.S. by Dark Horse Manga
Slugline: A follow-up to the original Gunsmith Cats, this series puts the girls back in action.
This volume contains a few very short stories and a longer story that only gets more and more complicated as it goes. I'm not sure whether the author expects us to know the characters already (I managed to miss both the anime and manga Gunsmith Cats) or if he just has not burdened them with a lot of personality, but I didn't find Rally or Minnie May terribly interesting.
The short stories were light and amusing and even the detailed gun-describing episode was interesting (then again, I've been known to find Punisher's equipment issues "interesting" -- though I'm not a gun nut at all.) The longer story was, however, increasingly tedious though I will give points for a more accurate portrayal of America than I've seen in other manga. The gun-toting granny was fun and the story has its good points, but on the whole it failed to grab me.
Fans of the Cats shouldn't let me stop them from trying Burst, of course. But if you're new to it, like me, this isn't the best place to start... try to find the original anime instead, it has a good reputation from what I hear.