Yes, the good people at H&K have taken their 90 years of experience in the field of weapon design to terrifying levels with this fusion of practicality and reckless endangerment.
They seem to have a lot lying around.
See how the MP5 not only fits into this stylish leather briefcase made for just that purpose, but also has a trigger embedded right there on the handle? You don't even need to change the way you're holding it, you can be strolling down the sidewalk, and with the twitch of a finger, suddenly be spraying hot lead indiscriminately in every direction. How fantastic/horrifying is that?
This guy is holding the briefcase all wrong.
Of course, knowing that your co-workers are armed with these means you'd better invest in ...