A stun grenade includes a fuze assembly secured to a housing adjacent gas outlet ports. The fuze assembly includes a fuze body having contact surfaces located in the flow path of the gas from the outlet ports so that gas flowing from the outlet ports impinges on the contact surfaces. The contact surfaces of the fuze body extend at an angle of no more than about 50 degrees to the first direction.

A composition for deterring intruders includes propionic acid, ammonia and water. A content of water in the composition is at least approximately 60% by weight. A system for spraying a composition comprises a nozzle configured to spray the composition in an area inside a building. The composition comprises propionic acid, ammonia and water. A content of water in the composition is at least approximately 60% by weight.

A composition for deterring intruders includes propionic acid, ammonia and water. A content of water in the composition is at least approximately 60% by weight. A system for spraying a composition comprises a nozzle configured to spray the composition in an area inside a building. The composition comprises propionic acid, ammonia and water. A content of water in the composition is at least approximately 60% by weight.

A gas powered fluid gun for propelling a stream or slug of a fluid at high velocity toward a target. Recoil mitigation is provided by a cavitating venturi that reduces or eliminates the associated recoil forces, with minimal or no backwash. By launching a quantity of water in the opposite direction, net momentum forces are reduced or eliminated.

A ocular irritant composition for personal defense includes a fatty acid at a concentration ranging from 5 wt % to 10 wt % of the composition, a thickening agent at a concentration ranging from 1.75 wt % to 8.75 wt % of the composition, a detergent at a concentration ranging from 1.03 wt % to 4.07 wt % of the composition, a surfactant at a concentration ranging from 2 wt % to 15 wt % of the composition, and water at a concentration ranging from 66 wt % to 90.21 wt % of the composition.

A ocular irritant composition for personal defense includes a fatty acid at a concentration ranging from 5 wt % to 10 wt % of the composition, a thickening agent at a concentration ranging from 1.75 wt % to 8.75 wt % of the composition, a detergent at a concentration ranging from 1.03 wt % to 4.07 wt % of the composition, a surfactant at a concentration ranging from 2 wt % to 15 wt % of the composition, and water at a concentration ranging from 66 wt % to 90.21 wt % of the composition.

A throwable animal repellant dispersing device with a receptacle containing animal repellant, a carbon dioxide or other similar pressurization cartridge contained within the receptacle, and a detonation apparatus with safety features to prevent accidental activation of the device, the receptacle being designed with a series of ridges and/or segments that operate to rupture in a manner such that the animal repellant contained within is dispersed relatively evenly amongst the associated deployment area, the safety features of the detonation apparatus including a lever to prevent a spring-loaded hammer from striking a detonation pin, the lever being held in place by two safety pins arranged substantially perpendicular to and interconnected with one another.

A throwable animal repellant dispersing device with a receptacle containing animal repellant, a carbon dioxide or other similar pressurization cartridge contained within the receptacle, and a detonation apparatus with safety features to prevent accidental activation of the device, the receptacle being designed with a series of ridges and/or segments that operate to rupture in a manner such that the animal repellant contained within is dispersed relatively evenly amongst the associated deployment area, the safety features of the detonation apparatus including a lever to prevent a spring-loaded hammer from striking a detonation pin, the lever being held in place by two safety pins arranged substantially perpendicular to and interconnected with one another.

A mobile security robot system is disclosed comprising a robot vehicle with pressurized fluid canisters, rotatable spray mechanisms, and a software control system for sensor-based or operator-triggered activation. An integrated invisible ink application module enables covert suspect tagging, while an automated refill interface allows docking with a fluid station for replenishment. The system provides non-lethal deterrence, evidence gathering, and optional environmental uses including plant hydration and wildlife deterrence.

A mobile security robot system is disclosed comprising a robot vehicle with pressurized fluid canisters, rotatable spray mechanisms, and a software control system for sensor-based or operator-triggered activation. An integrated invisible ink application module enables covert suspect tagging, while an automated refill interface allows docking with a fluid station for replenishment. The system provides non-lethal deterrence, evidence gathering, and optional environmental uses including plant hydration and wildlife deterrence.