The ERGO Switch-Max Xpress vertical for grip is a quick detach grip with an internal storage compartment and provisions for mounting a pressure switch. The vertical grip is attached to the rail with a throw-lever that is finger adjustable for tension to fit tightly on any Mil-Spec picatinny or weaver rail. The pressure switch pocket has inserts to fit Streamlight, or Surefire pressure pads and also an insert to use without a pressure switch installed. The exterior of the grip features a ribbed texture for a sure grip in any condition. The internal storage capacity is sized to fit CR123 batteries and the cap has an O-ring seal to keep the contents dry. This grip is molded from polymer, and made in the USA.