Why were spears called guns in ancient times?

Spears, guns and spears are all long-handled weapons, and the obvious differences are as follows:

The spear was first used, with edges on both sides of the tip and barbs at the tail, which is quite similar to the arrow. When it is pulled out, it will increase the secondary damage. If there is no tassel, it is sometimes used to throw.

A gun is a spear weapon with two sharp spikes protruding from its tip. The prismatic design can bring armor-piercing effect, which will increase the wound area after stabbing the enemy. After piercing the enemy, they are equipped with tassels to catch flying blood in order to avoid the blood fog splashing on their eyes.

Tube is also a weapon of spear evolution, mainly used in horse fighting, also known as horse tube. For the power of the charge stab, the body design is relatively long, which can effectively penetrate the enemy's body.