I have a preban 20" complete upper receiver with A2 flash suppressor, no baylug ( however included is one front sight with bayo lug I got off of ebay) A2 sights . 100% colt. Includes charging handle, bolt and bolt carrier. All original to gun. I was original owner and have sinced converted to an M4 config. Price is $425 shipped. In 98% condition. 3 day inspection. Money back if not satisfied, less shipping costs.