What weapons have been successful in history, but deviated from the original intention of the designers?

American GBU (Gemstone Road) laser-guided bomb penetrated the warhead-BLU-113, also known as super earth-penetrating bomb. With its own kinetic energy, it can easily penetrate 6 meters of reinforced concrete or 30 meters of soil to carry out blasting. This thing was originally used to attack nuclear bomb silos, and it can be said to be invincible against conventional fortifications. In the Gulf War, BLU- 1 13 was used to destroy the most important targets, such as Saddam's hiding place and nuclear parts warehouse.

Gatling machine gun, as a well-known machine gun that frequently appears in Hollywood tough guy action movies and countless games around the world, has attracted many gun fans crazy with its powerful firepower and beautiful appearance. However, in sharp contrast to the bullets it brought, Gatling machine guns were originally designed to reduce the casualties of soldiers. But in fact, the U.S. military, which has tasted the sweetness, has also developed a small-caliber Gatling machine gun, hoping to supply it to soldiers for hand-held operation. This is the 5.56mm version of the M2 14 machine gun.