Long Barrel is an attachment that appears in Call of Duty: Black Ops II. The Long Barrel increases the range of a weapon by 16%. Therefore the longer the initial range of a gun is, the longer the maximum range will be. The attachment is available for Submachine Guns, Shotguns and Pistols. It is incompatible with the suppressor attachment.
- The only weapons to actually change appearance cosmetically when outfitted with the Long Barrel are the Executioner and the Olympia.
- The Long Barrel doesn't actually increase the damage inflicted. Despite the statistic increase, rather it increases the distance of the damage drop-off by increasing the range.
- Menendez's Executioner in "Odysseus" has a long barrel attached, while in "Achilles' Veil", it has a standard barrel.
- The Long Barrel is comparable to the Range Proficiency from Call of Duty: Modern Warfare 3.