wish I'd seen / known about the Brownells video series. It would've been a lot easier to assemble the 1st lower I pieced together.
The job came out fine, though I used tools I had on hand , not specialized tools. I followed a Youtube video on assembling the lower parts
that was not as clear, in verbal instruction, or video clarity, as the Brownells links. Still managed to assemble one, and had 1 of my sons assemble one, with me providing direction. Good times.