A nonlethal cartridge adapted to be chambered in a firearm having a barrel that includes rifling, the nonlethal cartridge comprising: a cartridge case; a primer and/or a propellant disposed in the cartridge case and ignitable to produce a propellant gas; a sabot telescopically coupled to the cartridge case to allow relative movement between the cartridge case and the sabot in response to expansion of the propellant gas, wherein the sabot has a sabot mouth and is configured to fluidly communicate the propellant gas to the sabot mouth; and a nonlethal projectile configured to be propelled from the sabot through the barrel of the firearm, the nonlethal projectile comprising: a polymer base projectile portion disposed in the sabot mouth and formed of a first polymer material; and a polymer front shell projectile portion formed of a second polymer material that is softer than the first polymer material, the polymer front shell projectile portion coupled to the polymer base projectile portion and having an outer surface that includes a circular locking rib feature that forms an interference fit with the sabot mouth, thereby constraining the nonlethal projectile by the sabot mouth to prevent disconnection of a projectile snap, wherein the polymer base projectile portion is configured to engage the rifling of the barrel to impart spin stabilization to the nonlethal projectile when propelled from the sabot in response to the expansion of the propellant gas and the polymer front shell projectile portion is configured to deform upon impact to absorb impact energy. a cartridge case; a primer and/or a propellant disposed in the cartridge case and ignitable to produce a propellant gas; a sabot telescopically coupled to the cartridge case to allow relative movement between the cartridge case and the sabot in response to expansion of the propellant gas, wherein the sabot has a sabot mouth and is configured to fluidly communicate the propellant gas to the sabot mouth; and a nonlethal projectile configured to be propelled from the sabot through the barrel of the firearm, the nonlethal projectile comprising: a polymer base projectile portion disposed in the sabot mouth and formed of a first polymer material; and a polymer front shell projectile portion formed of a second polymer material that is softer than the first polymer material, the polymer front shell projectile portion coupled to the polymer base projectile portion and having an outer surface that includes a circular locking rib feature that forms an interference fit with the sabot mouth, thereby constraining the nonlethal projectile by the sabot mouth to prevent disconnection of a projectile snap, wherein the polymer base projectile portion is configured to engage the rifling of the barrel to impart spin stabilization to the nonlethal projectile when propelled from the sabot in response to the expansion of the propellant gas and the polymer front shell projectile portion is configured to deform upon impact to absorb impact energy. a polymer base projectile portion disposed in the sabot mouth and formed of a first polymer material; and a polymer front shell projectile portion formed of a second polymer material that is softer than the first polymer material, the polymer front shell projectile portion coupled to the polymer base projectile portion and having an outer surface that includes a circular locking rib feature that forms an interference fit with the sabot mouth, thereby constraining the nonlethal projectile by the sabot mouth to prevent disconnection of a projectile snap, wherein the polymer base projectile portion is configured to engage the rifling of the barrel to impart spin stabilization to the nonlethal projectile when propelled from the sabot in response to the expansion of the propellant gas and the polymer front shell projectile portion is configured to deform upon impact to absorb impact energy.