The Colt

The Colt is a supernatural revolver made by the hunter Samuel Colt. John Winchester had been searching for it for many years. According to legend, anything shot by this gun, using one of its thirteen original bullets, will die, including supernatural creatures normally immune to any and all weapons. On several occasions, it was in the possession of Sam and Dean Winchester, who used it to kill demons, including their leader, the Prince of Hell Azazel, vampires, including their Alpha, and a phoenix through time travel.

Appearance
The gun used in the series is actually a replica Colt Paterson 1836 ball and cap gun modified to fire metallic cartridges. On the barrel of the gun is inscribed a Latin quote from Psalm XXIII:4, "non timebo mala", meaning "I will fear no evil".

On the handle is a carving of a pentagram, with much of the finish removed to give it an aged appearance. It originally came with 13 bullets - eight were used before the Winchesters obtained it, and they used the other five. It then no longer worked. However, Bobby Singer and the demon Ruby, managed to make more bullets for it.

Overview
"Back in 1835, when Halley's Comet was overhead, the same night those men died at the Alamo, they say Samuel Colt made a gun...a special gun. He made it for a hunter -- a man like us, only on horseback. The story goes he made 13 bullets. This hunter used the gun a half dozen times before he disappeared, the gun along with him. Somehow, Daniel got his hands on it. They say -- they say this gun can kill anything."

- John Winchester tells the legend of the Colt

When John Winchester became aware of the power that the weapon had, he began to search for it so that he could use it to kill the demon that killed his wife - Azazel. He and his sons finally obtained it after a vampire killed the owner, Daniel Elkins, and the Winchesters attacked the vampire's nest to get it back. However, John gives it to Azazel in return for Dean's life being spared after an almost-fatal car crash, and at the end of the second season, Azazel uses it as a key to open a gateway to Hell that Samuel Colt had sealed. Dean uses the last original bullet to kill him.

Towards the end of the third season, the gun was stolen from them by Bela Talbot in order for her to get out of her contract with a Crossroad Demon. She told the Winchesters that she gave it to Lilith, but in fact she instead gave it to a demon named Crowley, who hid it. After Castiel and the Winchesters track down Crowley he returns it so that they can kill Lucifer. The boys find Lucifer and Dean shoots him straight through the head but Lucifer, although unconscious for a few moments, awakens and is unharmed, although it was painful, and he mentions he is one of five things in all of creation that the Colt cannot kill. It is seen once more when the Winchesters travel to 1861. Dean drops the Colt just before being transported back to the present day, where it is retrieved by the saloon owner Elkins, a possible ancestor of Daniel Elkins, who possessed the weapon at the beginning of the series.

Following the first defeat of Lucifer, the Colt was given to the Prince of Hell Ramiel by Crowley. Six years later, it is stolen by Mary Winchester and given to Arthur Ketch of the British Men of Letters.

In The Raid, the British Men of Letters reveal their possession of the Colt to Sam when the Alpha Vampire attacks their base. While the British Men of Letters lack bullets for the Colt and the knowledge to make them, Sam is able to tell them how as Bobby taught him. Sam is then able to use the Colt to kill the Alpha Vampire.

After a failed attempt to kill Dagon in The British Invasion, the Colt was taken by Eileen Leahy who returned it to the Winchesters.

Usage
The Colt's original thirteen bullets could kill almost anything; there were only five things in all of creation (including Lucifer) that couldn't be killed by the revolver.

After using all the bullets, Ruby helped Bobby make other bullets that can kill supernatural monsters. The Colt has a second function: the barrel of it acted as a key to unlock a Devil's Gate, as seen in the episode All Hell Breaks Loose - Part 2.

The following denotes the known uses of the Colt with the original "Samuel Colt" bullets shown in the color grey:

Trivia

 * The props department of the show has a rubber version to be used in fight scenes for pistol whipping.
 * The design of the Colt appears to be a stylized Colt Paterson black powder revolver, patented by Samuel Colt in 1836. The Colt Paterson, however, was designed to use musket balls, having been designed and patented prior to the invention of conical-shaped bullets.
 * The Colt has appeared at least once in every season from Season One to Season Six.
 * Lucifer mentions that there's five things in creation that the Colt can't kill, and only he so far has been confirmed to be one of them. In The Raid, the Alpha Vampire claims to be another, but Sam Winchester quickly sees through this lie as the Alpha Vampire hasn't attacked him yet. The Alpha Vampire's claim is proven to be false when Sam kills him with the Colt.
 * As Lucifer can't be killed by the weapon, the higher beings older than the archangels such as God, Death and the Darkness, likely are immune to it's effects. As they are not beings created by God and have always existed, they likely don't count for the five things in creation the gun can't kill. It can also be assumed that the Colt cannot kill the other three archangels.
 * While the Winchesters didn't know about the limitation on the Colt's ability to kill, Mary Winchester, who heard it from her father, the British Men of Letters and the Alpha Vampire all knew.
 * Dean Winchester has killed the most people on-screen with the Colt, with 5, He killed Elias Finch, Tom, Azazel, Gordon's Victim, and an unnamed hellhound with the Colt.
 * The fate of the Colt was unknown until Stuck in the Middle (With You), where it is revealed that Crowley gave it to Ramiel between the events of Swan Song and Exile on Main Street. It is currently in the Winchester's possession after Eileen Leahy missed Dagon.
 * In The Raid, the ritual for creating the Colt's new bullets is revealed.
 * The Colt has had a role in the deaths of two Big Bads: Dean used it to kill Azazel and later to kill a Phoenix whose ashes he needed to kill Eve.
 * In its Season Twelve return, The Colt was used to kill the same type of monster it was first used against in Season One and later in Season Three: a Vampire.