DLMS™ Summary National Stock Number 1005-66-155-5217 National Stock Number (NSN) 1005-66-155-5217, or NIIN 661555217, (mount,machine gun) has an unknown assigned date. This NSN does not replace any other NSNs. There are no manufacturer part numbers associated to this NSN. This part number has not been procured by the US Government in over 5 years. This NSN is unique to one weapons system. This NSN is assigned to Item Name Code (INC) 22990. [AN ITEM DESIGNED TO SUPPORT A MACHINE GUN. SEE ALSO MOUNT, MACHINE GUN, TRAILER MOUNTED. EXCLUDES MOUNT, GUN.]. This information was last updated on Jan 18, 2017.