text: Machine pistols A machine pistol is generally defined as a handgun capable of fully automatic or selective fire. During World War I, the Austrians introduced the world's first machine pistol, the Steyr Repetierpistole M1912/P16. The Germans would quickly follow suit with machine pistol versions of the Luger P08 "Artillery Pistol" and later models of the Mauser C96. Their light weight, small size, and extremely high rates of fire made machine pistols difficult to control in full-auto. Most machine pistols support a shoulder stock to improve control, like the Heckler & Koch VP70. Others, such as the Beretta 93R also have a forward hand-grip.
  3D printed handguns
  3D printed firearms are firearms that can be produced with a 3D printer. These kind of firearms are generally used for prototyping during the development of conventional firearms.
  Overview of gun laws by nation
  Many handguns are easily concealed – this has led to laws applying specifically to civilian handgun ownership and the legality of carrying or concealing a handgun whilst in a public setting. Gun laws broadly group gun types into handgun, long guns and to what degree they are automatic.  A large number of countries require reasonable grounds for gun ownership and operate permit systems for different gun types.