For those that dont like bull pups another angle. Back in 82 I busted my left arm badly & was off work for 6 months.
I couldnt shoot my springers very well so with time on my hands sawed up my old sharp innova & bullpupped it. As i am left handed it took quite a while & was not well finished.
The rear of the stock was sawn off & a pistol grip grafted to the forend, a trigger with spring loaded disconnector rod ran back through the gap between the pump handle & rear stock through a plastic guide tube. Sights were raised M16 style.
It was stocked with dollops of P38 & sprayed matt black, ugly as sin but it shot well. The great advantage of that rifle was it was small light & compact & could be fired by my right hand from either shoulder.
So for a disabled or one armed person they offer considerable advantage. It kept me shooting.