Barrett M107 Cause every gun shop needs at least one .50 cal firearm to display and hopefully sell. Although quite capable of sniping/counter-sniping, it’s more suitable for soft vehicles and ordnance disposal. Contrary to some beliefs, there is no Geneva Convention law against using a .50 caliber weapon on a human target. However in an ironic twist, the Hague Convention outlaws the use of hollow-point ammunition during war. Basically it’s okay to annihilate your enemy with a .50 cal rifle or machine gun, but if you shoot him with a handgun using hollow-point, you may have committed a war crime.