Life support units, namely, self-contained breathing units that deliver blower-assisted filtered air or bottled breathing gas in an integrated unit for non-medical use; small arms optic support for mounting optical devices in the nature of optical sights, optical scopes, image intensifiers, or night vision scopes; friend or foe units, namely optical identification of friend or foe assets which emit invisible infrared or thermal signals; and, helmet mount units for supporting an optical vision device in the nature of binoculars, monocular, night vision goggles, or image intensifiers on a helmet and for alternately positioning the optical vision device in an operational position in front of a wearer's eyes and a stowed position out of the wearer's line of vision; laser designators, namely, optical laser sights for firearms with an integrated handgrip sold together as a unit; trajectory guidance units employing laser and optical technology for use with man-portable, shoulder-fired weapons in the nature of grenade launchers and light anti-tank or anti-armor weapons