I just keep a 20 gauge coach gun handy with a butt sleeve on it with extra rounds, 3-0 buckshot. It's also my dove gun, so I'm very familiar with it.
Any field gun will work and if you want a short barrel, most pumps have that option, just buy the barrel or get a combo gun or just get something like a Mossberg 590 and forget about sporting uses. I'm a hunter, though, so I just use one of my hunting shotguns. I have a Mossberg 500, but don't ever take the plug out of the magazine. It's necessary for duck hunting. So, I've never bought a short barrel for it and prefer the coach gun, anyway, as it's shorter, lighter, and handier. But, that Serbu or whatever it is would be a bit of a LOUD SOB in the house and no more effective IMHO than my coach gun, LESS effective for me as i want a full stock on my shotgun. Pistol grips are for pistols.