RML, or Rifled Muzzle Loader, refers to a type of firearm that has a rifled barrel and is loaded from the muzzle end. The rifling consists of grooves cut into the barrel, which helps to spin the projectile for improved accuracy. RMLs were commonly used in the 19th century, particularly in naval warfare and artillery. These weapons typically fire elongated projectiles, such as shells or bullets, which are designed to fit snugly within the rifled barrel. The design allows for greater range and precision compared to smoothbore muzzle loaders. RMLs played a significant role in military history, influencing the development of modern artillery.