Each to their own indeed but if you take a pistol which is small and easily maneuverable, then add a stock, an extended body, and an extra long mag to make up for the reduced ammo capacity of a pistol, you end up with something that is less maneuverable and heavier than you started with which means you have LESS chance of getting accurate shots on target. So why not just use a rifle? Or better yet, an SMG.