DLMS™ Summary National Stock Number 1005-01-557-7775 National Stock Number (NSN) 1005-01-557-7775, or NIIN 015577775, (cylinder,gas,gun) was assigned October 29, 2007 in the Federal Logistics Information System (FLIS). NIIN 015577775 was cancelled on October 2, 2011, with a cancelled status of "Item is Cancelled WITHOUT Replacement." There is no known replacement specified for this stock number. 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 assigned to Item Name Code (INC) 22697. [A CHAMBER, CIRCULAR IN CROSS SECTION, FIXED TO THE BARREL OF A GAS OPERATED AUTOMATIC OR SEMIAUTOMATIC WEAPON, SUCH AS A CARBINE, MACHINE GUN, RIFLE, AND THE LIKE. THE DEFLECTION OF A PART OF THE ESCAPING POWDER GASES PUTS IN MOTION AN INTEGRAL PISTON TO OPERATE THE EXTRACTING AND RELOADING MECHANISM(S).]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 1005015577775 does not contain precious metals. This information was last updated on Jan 18, 2017.