I think the picture with the muzzle flash misses the mark. The perspective of this picture is that the intruder is supposed to be looking head on into the barrel, and can't tell if its a Mossber or Remington, thus making the point that it doesn't matter.
The muzzle blast is a side view, and the intruder would not be hit. It should be re-title "Homeowner needs a Surefire so he can see what he is shooting at".
I think you need to get your camera in front of your shotgun, fire off a round in the dark, and take a photo of the muzzle flash head on, and then use that in your poster.. Of course, I would advise placing your camera on a tripod for this maeuver.