Firearms

Firearms are barrel shooting weapons that use gunpowder gas energy to launch projectiles with a caliber less than 20 mm. It is mainly used to fire bullets and attack unprotected or weakly protected living targets. It is the main weapon of infantry and an auxiliary weapon of other arms. It is more widely used in civilian applications for security guards, hunting, and sports competitions.

Firearms are classified in many ways:

According to the degree of automation, it is divided into non-automatic, semi-automatic and fully automatic. Non-automatic firearms can only fire a single shot, and each loading and firing of the gun needs to be completed manually; semi-automatic firearms can complete automatic loading, but cannot fire continuously; fully automatic firearms can use gunpowder gas energy or other non-human external energy to achieve automatic loading. and burst fire.
According to the combat mission, they are divided into pistols, submachine guns, rifles, machine guns and special guns; according to the direction of the ammunition entering the chamber, they are divided into front-loading guns and breech-loading guns; according to the presence or absence of rifling, they are divided into smoothbore guns and rifled guns; according to the cartridge chamber According to the quantity, they are divided into single-bore guns and multi-bore guns; according to the size of the caliber, they are divided into small-caliber guns (below 6 mm), ordinary-caliber guns (6-12 mm) and large-caliber guns (above 12 mm).