20 STORAGE CABINETS, OVERSTORAGE CABINETS AND SHELVING SYSTEMS; MOBILE CABINETS AND SHELVING SYSTEMS, AND PARTS AND ACCESSORIES THEREFORE, NAMELY, SHELVES, BINS AND BIN SYSTEMS TO STORE GEAR, OPTICS AND OTHER EQUIPMENT INSIDE THE CABINET, BASES, STOCK CUPS, SUPPORT RAILS, BARREL SUPPORTS, PISTOL SUPPORTS, PISTOL HOOKS, RECEIVER MOUNTS, MUZZLE SUPPORTS, RETRACTABLE DOORS FOR FURNITURE; CARRIAGES CONSISTING OF METAL STRUCTURAL ELEMENTS ON WHICH STORAGE DEVICES ARE MOUNTED OR MOVE UPON AND SOLD AS A UNIT THEREWITH; MOBILE STORAGE SYSTEMS COMPRISED OF A PLURALITY OF MOBILE TRACK-GUIDED STORAGE CARRIAGES EQUIPPED WITH CABINETS, SHELVES OR OTHER STORAGE DEVICES WHICH ARE MOVABLE TOGETHER AND APART TO OPEN-UP AND CLOSE ACCESS AISLES BETWEEN THE STORAGE CARRIAGES, AND POWER UNITS AND CONTROL UNITS SOLD AS A UNIT THEREWITH; ANTI-TIP DEVICES FOR MOBILE TRACK-GUIDED STORAGE UNITS, NAMELY DEVICES WHICH STABILIZE TRACK-MOUNTED STORAGE UNITS AGAINST TIPPING AND SOLD AS A UNIT THEREWITH