I've been trying to decide what I think. So far I don't think much.
I won't be as gracious as some others may be. Carrying a gun is serious business. It doesn't do much good if you don't have access to it. In some cases it may get you killed. Your behavior with a gun may be different then if you didn't have one. I'd much rather hurt your feelings then you going around with a false sense of security.
You have a hammer to snag so shooting it from the bag may not be the best idea. To reliably remove it you need two hands. I have unbagged many items from bags like that and sometimes it takes a little maneuvering to get it out. Unless you bob your hammer and make other adjustments I don't see you drawing it quickly or reliably.