I'm generally not one to add anything to a shotgun, short of maybe aftermarket slug sights, but that is one fine looking Police Magnum, Chief Brody.
The Police Magnum with walnut is one of my favorite shotguns, the other being an Ithaca '37 LAPD special.
That is what comes to mind when I think "riot gun".
NRA Life Member
Big Sister: "You should be sponsored by Allen"
Me: "If you can't shoot good, at least look good walking to the firing line."
Big Sister: "Can you not afford a Pelican? Then buy an Allen gun bag."