DLMS™ Summary National Stock Number 1015-12-139-7450 National Stock Number (NSN) 1015-12-139-7450, or NIIN 121397450, (firing pin-push) has an unknown assigned date. This NSN replaces 1 stock number, 1015014590753. 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 assigned to Item Name Code (INC) 77777. This information was last updated on Jan 20, 2017.