Practical defense - from CCW to mass shooter response.Oxys' services are ideal for any organization which is politically unpopular, has any social presence and a genuine desire to counter active shooter violence. Our typical clients want to minimize uncertainty and liability so they can focus all efforts on being profitable.Oxys' advice is detailed, current and engaging. Our plans help you immediately gain customer respect, better workplace safety, and build employee camaraderie.We know the bottom-line of business better than any other tactical training firm.We are "practical tactical".