A system and method for a modular, low lethal projectile is provided. The modular, low lethal projectile system comprises an exterior shell, propellant cartridge, and a projectile assembly. A propellant mounting area is arranged at a rear end of the exterior shell and is offset from a center of the exterior shell. A propellant cartridge is secured within the propellant mounting area. A firing pin of a firearm is configured to strike an edge of a cartridge primer of the propellant cartridge, which ignites a primer material and propellant within the propellant cartridge. The resulting hot, expanding gasses propel the projectile assembly form the firearm, and upon contact with a desired target, the capsule tube of the projectile assembly breaks, distributing an effective compound into the air around the desired target.