Colt Single Action Army revolver: This was Billy the Kid's primary weapon, and he was known to carry two of these revolvers at all times. The Colt Single Action Army was a popular revolver in the American West at the time, and was known for its reliability and accuracy.
Winchester Model 1873 rifle: Billy the Kid is also known to have used the Winchester Model 1873 rifle, which was a lever-action rifle that was popular among cowboys and outlaws in the American West.
Schofield revolver: Billy the Kid is believed to have used a Schofield revolver on occasion. The Schofield revolver was a double-action revolver that was issued to the United States Cavalry, and was known for its smooth trigger pull and reliability.
Bow and arrow: Billy the Kid is also said to have been skilled with a bow and arrow, and is known to have used it on occasion for hunting and self-defense.
In addition to these weapons, Billy the Kid was also known to use a variety of knives and other bladed weapons, including a Bowie knife and a hunting knife. He was a skilled knife-fighter, and was known for his ability to quickly draw and use his knife in a fight.