A pressurized canister launcher that fires 40mm canisters containing an aerosolized sedative compound that creates a 5-meter-diameter cloud of incapacitating gas. Targets who inhale the aerosol experience rapid onset drowsiness and loss of motor coordination within 15 seconds, followed by unconsciousness within 45 seconds. The sedative effect lasts 20-30 minutes, during which time the subject can be relocated, restrained, or searched without resistance.

Lazarus developed the CH-3 for medical emergencies — specifically, for situations where patients experiencing psychotic episodes, BCI-induced seizures, or cyberware malfunctions needed to be sedated immediately and at a distance. The weapon's medical origins are reflected in its calibration: the sedative dosage is calculated for the average adult body mass, with a safety margin that prevents respiratory depression in most subjects. 'Most' being the operative and insufficient word.

The CH-3's medical safety margin fails for anyone significantly below average body mass — children, small adults, the malnourished — and for anyone with respiratory conditions, cardiac issues, or certain drug interactions. In the controlled environment of a hospital, these variables can be assessed before deployment. In the uncontrolled environment of a street operation, they cannot. The Mercy Fog sedates everyone in its cloud without discrimination, and some of those people will stop breathing. Lazarus's liability documentation recommends medical monitoring of all exposed subjects, a recommendation that is ignored in approximately 100% of field deployments.