keep in mind,that you are not looking for a defensive weapon. This thread is about an assasination tool. Set up right, you are probably not gonna need 20 rounds of 9mm from a polymer wonder. A revovler seems to fit the bill better, as a misfire just requires a pull on the trigger. Imagine a hitman taking time to tap and rack the gun if there is a bad round, a feeding problem or a failure to eject. Add that to the advantage of not leaving any casings behind and i think its shortcommings is outweighed by this.

another advantage with the shotgun is that it´s pretty hard to match a handfull of buckshot to a specific weapon = dont have to worry about ballistics.

Shot gun interesting stick it in your pants. People will think you have a really really big dick

Then after you use it you can call Stanley steemer to clean up the mess. Like it never even happened.

pesky buffalo mobsters pilfering too many condiments from your fast food establishment then retreating like the cowards that they are behind a brick wall? the mk211 raufoss may be the solution!

https://www.youtube.com/watch?v=_jF9eqi4oK0