Nice.
The scary black rifle is a wonderfully engineered weapon.

Building from scratch is not very difficult.
If you acquire good tools and study up a bit you will have a good experience.

I've done two.
Here's my scratch-built 16" .223 Wylde mid gasser...
(every single part has a story and came from a different place)

Beautiful 4:00 eject the first time I pulled the trigger on it with Lake City XM193.
I peed down my leg.