No one builds all of their own parts, the forgings come from a handful of sources and none of the forging houses do complete builds. A lot of internals are sourced elsewhere and some of those sources offer low end parts, hence the whole milspec and proper testing of said parts. Some companies ensure their parts are to spec and most do not. I imagine Colt does the testing on their main line guns but there is no way they would go through the hassle of testing and use the same high end parts in their cheap offering. That would kill their sales and makes absolutely no sense. Again, when you watch the videos and read around the internet the consensus is that the Expanse is nowhere near a Colt built rifle. Mildot hit the important parts which are bolt and barrel. That's not to say the other parts aren't important but the biggest problems arise from poor bolts and poor barrels.
The OP asked about getting an AR, offering another option is neither useful nor relevant..
Without doubt the Colt expanse is not a pure Colt AR. Colt is going through some very difficult times so it would seem quite logical to try and build an entry level AR to increase sales. I agree with many experts who say that it would have been impossible for Colt to build this gun in house at this price point.
The following is my observations based on everything I have watched and read. There may be facts unknown to me that would change my conclusions.
Enter the “Expanse”
As far as I can tell Colt lowers were shipped to Bold Ideas, a Texas based company that made the Colt Competition line of ARs, to assemble into a finished Expanse rifle. Bold Ideas had no affiliation with Colt and used the Colt name under license only. They have since declared bankruptcy and are suing Colt for breach of contract. See here for details.
http://www.thefirearmblog.com/blog/...-million-dollars-expanse-production-cutbacks/
I decided to buy an AR this summer and after reading all reviews I could find, including the not so flattering ones I decided on the Expanse.
The critical reviews actually pushed me in the direction of buying the Expanse because not one Expert would call the parts in the Expanse junk.The complaint in the reviews was that it was not purely Colt. Even critical reviewers went to great pains to say that they were not saying the Expanse was a poorly made rifle. Their beef was that it was not made in the Hartford Connecticut factory and not marked as such.
Maybe it was an unwise choice Colt made by tagging their name on a rifle made by Bold Ideas in a non union shop in Texas.
Did Bold Ideas make poor rifles?
It appears their Colt Competition line of rifles were well respected and liked by those that bought them. Reviews are positive. It would seem that Colt made a pretty sound decision in partnering with Bold Ideas to produce the Expanse.
Is my Expanse as good as an AR with all Colt parts? Probably not but I bought optics and a pile of ammo to shoot for what it would have cost me for a Colt LE6920. So ya I’m happy with my choice. I have a reasonably priced AR complete with Leupold optics and 1000 rounds to shoot for around $2000.00.
Seems like the Expanse saga will fade to memory unless Colt finds someone else to build them.
Forum talk has it that CDNN SPORTS bought up all, or a lot of the parts used by Bold Ideas to make the Expanse.
Want to take a look at the parts in my Expanse? They are listed here.
https://www.cdnnsports.com/gun-parts.html#brand=AR&manufacturer=COLT,COLT COMPETITION
The Barrel and Bolt and Bolt Carrier in my gun look the same, are stamped the same, and fit the description.
The single heat shield hand guard, stock and pistol grip look the same.
One thing I did do to my Expanse was to take out a couple of steel weights in the buffer and replace them with two tungsten weights to give me an H2 buffer.
I didn't mark the buffer to indicate the change I made. I think that is fitting for my first AR that has so much controversy surrounding it. An AR with a Colt lower and unmarked parts making the whole.
To the OP.
This is the route I took to get into the AR games and I did it for around $2000.00, all in, ready to head to the range!