Raytheon has created the Pike which one of the smallest laser guided missile.

Pike™ is a 17-inch-long, semi-active laser-guided precision weapon, measuring 40 mm in diameter and weighing two pounds. It’s the world’s only hand-launched precision-guided munition. Fired from a rifle-mounted grenade launcher, the miniaturized munition can travel one and a half miles and hit within five yards or less of a target, minimizing collateral damage.