A buddy of mine showed up today for lunch with a mostly-stripped lower, and a complete parts kit. I've never put one together, but I happen to have a grandson who eats at my table, ad is a school-trained Small Arms Repairer, MOS 91F. It took a bit over an hour, and there was a learning curve. It appears that in MOS school, they never started with a stripped lower. But, we got it all together.
There seems to be a problem wit the bolt hold-open. My buddy believes that he got a defective part in the kit. I don't know. But, we put my upper on it and ran three rounds though it. It goes bang, and that's done.
I wished I had taken pictures, but I didn't think about it unit the chore was over.
I see that there are some tools that would have made the job a bit easier, so I went over to Brownells and ordered the kid an Armorers Essential Kit. and a set of screwdrivers. He's worth it, and it would have made this job a whole lot easier.
That's how I spent my Sunday afternoon.