What the heck is a "normal firearm"?
One that ain't tacticool pimped out. I don't deer hunt with an M2 or duck hunt with a trench gun, all I'm sayin'. There are more optimum tools for the job. A 28" pump swings a lot smoother on a fifty yard high goose and patterns better with a modified choke and 3" Federal tungsten iron at that range than an 18" cylinder bore or even an 18" properly choked gun. Why should I buy a tacticool shotgun to hunt with? I don't have any other use for a shotgun than the occasional clay shoot with the club or my bird hunting. My daily carry gun is a handgun and that's what I use for self defense. I really don't consider a shotgun very practical for daily carry in downtown Houston where I'm most apt to be accosted.
Like I say, to each his own. If you feel you have a need for a sawed off pistol gripped shotgun, great. I don't consider it the optimum in shotgun configurations, though, for hunting unless you're deer hunting with slugs. There are MUCH better choices for bird hunting and clays shooting.
My uncle was the best shot I ever knew. A veteran of the European theater in WW2, he grew up shooting squirrels in the woods around Conroe, Texas during the later depression years. His mom ran a boarding house there. That man could take an empty .22 brass, flip it in the air, and shoot it 100% of the time, no misses. I've seen him do it. He could literally shoot dove with that .22, but he used a shotgun for that, his favorite M1100 in 20 gauge for bird hunting. He loved to hunt quail and dove and had pointers for the quail. I never even saw a "riot gun" until I was a 20 something adult, never knew they existed. As into waterfowl hunting as I was at that time, I didn't really care about "riot guns". They were for cops and soldiers, not sportsmen.
I support your right to use what you want and certainly to own what you want, but I think hunting with a riot gun is a bit silly when more appropriate shotguns are available so affordably. You don't putt with a driver, do you? JMHO of course.
I'm not advocating gun laws here. I wear a helmet every time I get on a motorcycle, but I'm totally against helmet laws. I'm a libertarian. I just figure use the right tool for the job. If the job is killin' people, a riot or trench gun may be the tool, but not wing shooting. I think trying to tell the antis "Yes, I can hunt with my M16." is the wrong political approach. Sure, you can, but there are better weapons for hunting, closer to what you'd use as a sniper, perhaps. I also think in the helmet law debates, guys who try to use arguments that a helmet is dangerous because "you can't hear out of one" or "they cause neck injuries" are using the wrong argument, too. The pro helmet laws can chew that one up with logic, not to mention accident statistics. The argument to use is "because I don't want big brother telling me how to save myself". With firearms, there is this thing that guarantees you the right to keep and bear arms specifically for MILITARY use! You're guaranteed that freedom. Why should you use some lame argument that a sawed off shotgun is a viable sporting arm????? All they have to do is use logic to kill your argument. Fight 'em with libertarian and constitutional arguments and you will be right! Their arguments refuting the second amendment are lame and they know it!