Black Barrel

is one of the Seven Superweapons of Atlas, one of seven weapons developed and kept by Atlas of the Mage's Association.
==Characteristics==
Black Barrel and Mashu.png|Mash Kyrielight wielding the Black Barrel.
Aphrodite Black Barrel.gif|The Black Barrel in action against Aphrodite.
Demeter Black Barrel.gif|The Black Barrel firing at Demeter.
Zeus Black Barrel.gif|Zeus struck by the Black Barrel.
Mash pierces Cernunnos' divine core.gif|Mash piercing Cernunnos' Divine Core.
Mash firing the black barrel in lostbelt second half trailer.gif|The Black Barrel firing in the Fate/Grand Order Cosmos in the Lostbelt second half trailer.
The gun is a "Conceptual Weapon of natural life-span", capable of imposing the notion of limited life-span into the body of near-immortal creatures. Composed of True Ether, bullets fired from the gun will disintegrate all instances of Grain and Ether they come into contact with, ignoring any parameters of beings that intake either substance to deliver direct damage.
The greater the quantity of Grain and Ether, the more damage will be inflicted upon the enemy, and it is impossible to even hold it unless the body is free of such substances. This makes it extremely effective in the Land of Steel, as only a few remaining lifeforms lack Grain, such as unmodified humans. Due to the Aristoteles possessing extremely large quantities of Grain, it is extremely effective against them, giving it the nickname of "a gun that kills gods." The gun, which is normally a rifle-type with a curving buttstock, is extremely versatile in that it can be refitted with a number of different options to allow for use as a sniper rifle.
There also exists a handgun replica named Barrel Replica, which was also found by Gun God during his excavation, used by Sion Eltnam Atlasia.
==Role==
===Notes.===
Wanting revenge for the death of his loved ones when the Western Continent was scorched, the man nicknamed Gun God dug out the Black Barrel from the sealed region of Atlasia, learning to shoot in order to avenge his family.Notes. - 3/Roman He used it on Type Venus when he participated in the battle to take her down, hitting Type Venus directly in the forehead and placing it into an eternal sleep.Notes. - 0/GODO The feat gave him his nickname.
===Tsukihime===
Ciel is able to obtain Black Barrel after returning to the Holy Church headquarters. Arcueid Brunestud implies her obtaining it has something to do with exchanging information with Enhance. While Ciel plans to use it to seal Arcueid, Shiki Tohno's interruption of the fight causes it to remain unused.Tsukihime - Near Side: Ciel's route - Good End: Sun
===Fate/Grand Order===
====Olympus====
Mash Kyrielight was given a replica of the Black Barrel by Sion Eltnam Sokaris during the Greek Lostbelt, which she integrated into Ortinax so to augment its Bunker Bolt mechanism, being capable of transforming her shield into a cannon, having been constructed using Poseidon's Divine Core and a piece of Artemis, allowing her to kill Gods in exchange for Ritsuka Fujimaru needing to use a Command Spell as its ammunition and sacrificing a part of their life energy to activate it.Fate/Grand Order: Cosmos in the Lostbelt - Olympus: Interstellar Mountain City - Section 7: Thou Art the Harvest that Reaps the Stars (IV)
Mash uses Black Barrel on Aphrodite,Fate/Grand Order: Cosmos in the Lostbelt - Olympus: Interstellar Mountain City - Section 13: Thou Art the Ardor that Corrupts the Stars (V) Demeter, and ZeusFate/Grand Order: Cosmos in the Lostbelt - Olympus: Interstellar Mountain City - Section 21: I Am the Thunder that Smites Stars (IV) during Chaldea's attack on Olympus.
====Avalon le Fae====
After Mash loses her memory, Black Barrel comes into the hands of Boggart who uses it on Morgan's army.Fate/Grand Order: Cosmos in the Lostbelt - Avalon le Fae: Fae Round Table Domain - Section 7: Fragment 4/Sheffield (II) Beryl Gut and Baobhan Sith torture Boggart and intend on taking Black Barrel, but it mysteriously disappears after they drop Boggart from the top of his castle.
It is later revealed that Habetrot was the one who took it, having kept it safe for Mash in spite of the fact that Fairies are poisoned by exposure to advanced technology. Mash uses Black Barrel on Cernunnos after Artoria Avalon exposes its Divine Core with her Holy Swords.Fate/Grand Order: Cosmos in the Lostbelt - Avalon le Fae: Fae Round Table Domain - Section 29: A Prophecy 
==== Tunguska Sanctuary====
Habetrot's prolonged exposure to Black Barrel has made her its "guardian Fairy" of sorts (similar to Nanako and the Seventh Holy Scripture (Remake)), greatly enhancing its capabilities and granting it the ability to be used as a physical weapon as well as a Conceptual one. When being used as a weaker, physical weapon it does not require a Command Spell as fuel.
==References==
Category:Mystic Codes
Category:Conceptual Weapons
Category:Firearms
Category:Inventions of Atlas
Category:Terminology in Notes
Category:Terminology in Tsukihime
Category:Terminology in Fate/Grand Order
Category:Chaldea Security Organization technology