The Colt

The Colt is a revolver made by Samuel Colt (apparently for a Hunter). 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 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, vampires and other supernatural creatures.

Appearance
The gun used in the series is actually a replica Colt ball and cap gun modified to fire metallic cartridges. On the barrel of the gun is inscribed the Latin phrase "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, the demon Ruby "fixed" it so that it could kill anything using other bullets (or she just made more bullets for it).

Story
The Legend of The Colt (as told by John Winchester) is as follows: 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. Colt made thirteen bullets. The hunter used the gun a half-dozen times before he disappeared, the gun along with him. They say this gun can kill anything. (Though Halley's Comet did pass over in 1835, the battle referenced in the legend would have been the Texas Revolution, not the Battle of the Alamo.)



Years later, when John Winchester became aware of the power that the weapon had, he began to search it so that he could use it to kill the demon that killed his wife - the demon 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. It is then featured in two time-travel episodes, before Crowley returns it to the Winchesters so that they can kill Lucifer.

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.

Usage
The Colt's original 13 bullets could kill anything (except Lucifer and four other things). They can be used to kill almost any supernatural creature, such as demons, vampires and the phoenix. It's possible that the gun can kill regular Angels as Castiel believed it would kill Lucifer - an Archangel.

After the using all the bullets, Ruby somehow helped Bobby make other bullets that can kill a lot of supernatural monsters.

The Colt has a second function: the barrel of it acted as a key to unlock a Gateway into Hell, as seen in the episode All Hell Breaks Loose - Part 2.

Use of the Colt
The following denotes the known uses of the Colt with the original "Samuel Colt" bullets shown in Grey.

Trivia

 * As established, it cannot kill Lucifer and four other unknown things in all of creation.
 * It's interesting to note that the demons were in possession of the Colt during the entirety of Season 4, yet it was not used to kill angels. In fact, Alastair lamented the fact that the worst they could do to angels was exorcize them from their vessels and banish them temporarily to Heaven.
 * This may be due to the fact that the Colt was in Crowley's possession. Crowley, unlike the other demons, did not want Lucifer to be set free, as he feared Lucifer would destroy demons after destroying humans. Therefore, he would not have done anything to help the other demons in their war against the Angels.
 * It is unconfirmed whether the Colt can kill Reapers or not. Death's Scythe is the only weapon that has been confirmed as being capable of doing so.
 * The Colt has appeared in six seasons so far but does not appear in Season 7.
 * Colt himself only appeared in Frontierland of Season 6.
 * It's unknown what happened to The Colt after the events of Abandon All Hope....
 * It's unknown if The Colt can kill Leviathans, although having in mind that it can't kill only five creatures in all of creation, possible it can, though unlikely.
 * In the John Winchester's Journal, he think that The Colt may have inscribed with the words "NON TIMEBO MALA" ("I will fear no evil" in Latin)
 * It's likely that Lucifer meant five species in all of creation. The most likely creatures immune are Angels/ Archangels, Leviathans, Deities (pagan gods, fate etc) and possibly Eve. If Eve qualifies as a deity then there could be another creature or group of creatures immune to the colt.
 * Characters off the list, per they're not part of creation:
 * God, obviously.
 * Death
 * The rest of the Horsemen, as they're truly indestructible.