DLMS™ Summary National Stock Number 1005-01-657-4731 National Stock Number (NSN) 1005-01-657-4731, or NIIN 016574731, (heatshield assembly) was assigned August 16, 2016 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs. There is only one manufacturer part number associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by one supplier. Today, one supplier is listed as an Active supplier for this NSN. Of the active suppliers, only one supplier is deemed design controlled or valid supply parts. This part number has not been procured by the US Government in over 5 years. This NSN is assigned to Item Name Code (INC) 52480. [AN ITEM TO ALLOW HEAT TO DISSIPATE EQUALLY, TO PREVENT A MIRAGE OF HEAT. THE ITEM ACTS AS A PROTECTOR TO PREVENT BURNING OF THE SKIN. IT MAY BE MADE OF PLASTIC AND/OR METAL. THE ITEM ATTACHES TO THE BARREL OR RECEIVER OF A RIFLE OR MACHING GUN AND MAY HAVE OTHER ITEMS ATTACHED SUCH AS SCOPE OR SIGHTING DEVICES.]. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 1005016574731 does not contain precious metals. This information was last updated on Oct 01, 2016.