>> Search results for: SP401737 NSN Search Results National Stock Number (NSN) Description 1005-01-621-9178, 1005016219178 ADAPTER RAIL,WEAPON MOUNTED 1005-01-631-4056 , 1005016314056 ADAPTER RAIL,WEAPON MOUNTED 1 Related Inventory Search You can use this search box to continue searching. Search parameters can include any combination of characteristics, specifications, description, partial part numbers, NSN or other stocking number. Special characters are not needed and are automatically stripped before searching. Do you sell this part? Become part of our growing pool of certified suppliers. Send Information