The enhanced mil-spec design allows the air-tight M3X to be exposed to the world's harshest environments, be it blinding desert sand storm or swimming 66 feet under salt water. Non-dedicated by design, the patented Slide-Lock interface provides rapid attachment/detachment to virtually any weapon with a MILSTD-1913 rail (or equivalent) while the interchangeable backplates provide multiple, user-defined, configuration options for maximum versatility. Shown w/optional ext switch.