I built one a few years back I used one of the nodak receivers and one of them kit from Malaysia. inside the buttstock was the serial number I wish I could have had that in grave on the receiver but I couldn't as nodak already put a serial number on it. I consider it a true colt simply because 99.9 parts are colt and only one part the lower is not so I will argue this to my day that it is a real colt