DLMS™ Summary National Stock Number 1005-66-156-1203 National Stock Number (NSN) 1005-66-156-1203, or NIIN 661561203, (arm,mount,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) 67796. [A SOLID METALLIC ITEM REQUIRED BETWEEN THE GUN AND THE PEDETAL, MOUNT OR TRIPOD. ITEM ALLOWS THE GUN TO BE ARTICULATED IN BOTH AZIMUTH AND ELEVATION.]. This information was last updated on Jan 18, 2017.