The Munai-bailer (Kazakh: Мұнай-байлер) roughly translated to Oil-drillers, are a faction in Metro Exodus who are hostile to Artyom and his companions. The Munai-bailers serve as the antagonistic force of the Caspian Arc of Exodus, along with its leader The Baron.
The Munai-bailer are a group of around 700 raiders mostly made up of ex-soldiers, mobsters, and Svarog Oil workers who have managed to secure vast oil reserves in the Caspian region. They are one of the few post-apocalyptic factions to not only have access to working vehicles, but maintain a large number of them. They have used these resources to enslave the local population and fend off any other raider groups who made incursions into the region. The Munai-bailer are also noticeably better armed than most bandit groups, sporting advanced weapons like the Bulldog and the Shambler, and even employing armored soldiers with Gatling guns. Recently, they have started styling themselves as "fire gods", presumably to keep their slave population in line.
It is unknown whether the Munai-bailer are still intact after the Baron's demise and the destruction of their main base by Giul. If Artyom murdered Saul, it is possible that the Munai-Bailer will eventually collapse or vise versa. Given that the bulk of the Munai-bailer forces were away on a raid when the Aurora crew arrived, however, it is probable that the raiders will continue to plague the Caspian for years to come.