Part Number: 1270-00-344-4922 (Sight unit)Part Number: 1346559 (Sight unit)Part Number: 1346569 (Sight unit)Part Number: 1346569-0 (Sight unit)Part Number: 1347281 (Sight unit)Part Number: 1368398B (Sight unit)Part Number: 1436569 (Sight unit)Part Number: 1493435 (Sight unit)Part Number: 323353-1 (Sight unit)Part Number: 323383 (Sight unit)Part Number: 7647931 (Sight unit)Part Number: 9376242 (Sight unit)Part Number: D674972 (Sight unit)Part Number: MK10MOD0 (Sight unit)