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Barrel Replica (バレルレプリカ, Bareru Repurika?) is a Mystic Code that is a replica of the Black Barrel, with the apperance of a CZ 75. Described to look like a CZ 75 handgun, it is a Conceptual Weapon of "natural lifespan" that puts out a toxin, attack power, in proportion to that life form's natural life span. Sion's Arc Drive uses the Barrel Replica, but its original function isn't being utilized. Barrel Replica Obelisk, Sion's Last Arc, discharges energy from it horizontally, but requires anchoring her body to the ground with Etherlite to avoid being blown back by the recoil. Though it is incapable of wiping out Night of Wallachia, it can hamper the program by many years.
In Melty Blood, the Barrel Replica holds up to 13 bullets. Her Warning Shot special move shoots differing amounts, depending on whether or not the button was held. In UNDER NIGHT IN-BIRTH, Eltnum's pistol also has a gauge of 13 shots. Bullets are consumed when inputting the command for either Hollow Point or Warning Shot. Eltnum is forced to Reload if she runs out of bullets. Normal bullets are white, used bullets are black and reinforced bullets are purple.