A firearm is a gun that uses an explosive propellant to fire a bullet. It can be a rifle, pistol or shotgun. A rifle is a long gun with a barrel that has spiral grooves cut inside it (called rifling) that impart spin to the projectile, increasing its accuracy and distance https://knockarms.com/.

The term firearm is commonly used to refer to any gun that is capable of firing a cartridge, but it can be confusing as there are many different types of guns. The most common types of guns are rifles, pistols and shotguns.

Rifles: a rifle is a long gun with a revolving barrel that has a series of spiral grooves cut inside it, called rifling, that imparts spin to the projectile, increasing its accuracy. It is the type of gun most people think of when they hear the term "gun."

Pistols: a pistol is a short or hand-held weapon with a detachable magazine that holds a cartridge and has a trigger. It is designed for semi-automatic or automatic firing, and can be single shot, repeating, or pump action.

Revolvers: a revolver is a short or hand-held firearm that has a revolving cylinder with five to nine chambers. The cartridges are manually loaded into the cylinder and as it rotates, the trigger can be pulled to release the hammer that fires the cartridge. Revolvers can be single or double action, according to the system of operation of the trigger tail.

Shotguns: a shotgun is a gun that is not a rifle because it does not have a revolving barrel. A shotgun's barrel is made of a steel tube with a hammer that strikes a charge of ammunition, or a pellet of gunpowder, that ignites and propels the bullet forward. It is a type of gun that is legal to own in most countries.

Machineguns: A machine gun is a firearm that can fire a large amount of bullets at a fast rate without the need for manual reloading. It can be a heavy machine gun, such as a grenade launcher or a tank gun, or it can be a light machine gun, such as an anti-aircraft weapon or a sniper's rifle.

These weapons are designed for combat, but can be used for law enforcement as well. They are often crew-operated ('heavy machine guns') but can also be operated by one person ('light machine guns').

Hunting: a hunting gun is a rifle or pistol that is designed for use in hunting. It may have a scope to help locate and track targets, and it can be used for small game hunting or for self-defence against other people.

The most common reason for unintentional firearm death is when someone is playing with or cleaning the gun, but other circumstances are also associated with these deaths. For example, the perpetrator may have thought the gun was unloaded. The highest rate of these deaths is for children and teens, ages 10 to 19; it is lower for adults, ages 20 to 29.