Rifle

A rifle is a long-barreled firearm specifically designed for accurate shooting. Most rifles are built to be held with both hands and braced against the shoulder using a buttstock. This design provides the stability needed for precision.

Rifles are used in many different ways, including warfare, law enforcement, hunting, and target shooting sports. They represent a major technological leap from earlier smoothbore weapons like muskets. While muskets were often used for imprecise, massed fire, rifles allow for much higher accuracy and effectiveness.

The core mechanism that enables this accuracy is called rifling. Rifling is a pattern of helical or spiraling grooves cut into the inside of the barrel. The raised areas between these grooves are known as lands.

As a projectile, such as a bullet, moves down the bore, the lands make contact with it. This contact exerts torque, which is a twisting force, on the projectile. This force causes the bullet to spin as it travels through the barrel.

When the projectile leaves the barrel, this spin persists. This creates gyroscopic stability due to the conservation of angular momentum. This stability prevents the bullet from tumbling, which increases its accuracy and effective range.

To propel the projectile, rifles use a process called deflagration. This is the rapid burning of a combustible propellant compound inside the firearm. Historically, this was black powder, but modern rifles typically use nitrocellulose or other smokeless powders.

Some rifles do not use chemical propellants at all. Air rifles use compressed air to launch projectiles. These are often used for small game hunting, vermin control, and casual sport shooting, also known as plinking.

Modern rifles are classified by how they function and how many shots they can fire. Single-shot, bolt-action, and semi-automatic rifles are designed to fire only one shot per trigger pull.

Automatic rifles are different because they can fire multiple rounds with a single squeeze of the trigger. Some automatic rifles are even designed to fire fixed bursts of two or three rounds. While automatic rifles can overlap with machine guns in function, they remain distinct. Rifles are generally lighter and more mobile, whereas machine guns are heavier and designed for sustained fire. Machine guns often use belt-fed ammunition and can exchange barrels to prevent overheating, while rifles usually use magazines and fire from a closed bolt for better accuracy.

The history of the rifle began with early experiments in Europe during the 15th century. Some records suggest grooved barrels were manufactured as early as 1440. Scholars have attributed these developments to figures like Gaspard Kollner of Vienna or Augustus Kotter of Nuremberg.

For a long time, military commanders preferred smoothbore muskets over rifles. This was because rifles were slower to reload and prone to powder fouling. Fouling occurs when residue from the gunpowder clogs the barrel. In the 18th century, mathematician Benjamin Robins discovered that elongated bullets could slice through the air more easily than spherical musket balls. This helped explain why rifled weapons could be so much more effective.

In the American colonies, the development of the long rifle changed how warfare was conducted. These rifles, such as those made by Jacob Dickert before 1740, had tighter bores and longer barrels than the common Brown Bess musket.

The longer barrels allowed the burning gunpowder to act on the bullet for a longer time, increasing its speed. During the American Revolution, units like Daniel Morgan's Riflemen used these weapons to target officers and cannoneers. This precision proved pivotal in battles like Saratoga and Cowpens. Later, the invention of the Minié ball in the 1840s solved the problem of slow loading, allowing rifles to finally replace muskets on the battlefield.

Today, the term "rifle" is used in several specific contexts. In a military sense, it refers to an individual weapon. However, the term is also used for larger, crew-served weapons that fire explosive shells, such as naval rifles or recoilless rifles. In fiction, the word is sometimes used more loosely. It might describe any weapon with a shoulder stock, even if it is not actually rifled, such as a fictional laser rifle. From historical long rifles to modern semi-automatic designs, the evolution of the rifle has consistently focused on increasing precision and efficiency.