system
A chat on subreddit /r/PoliticalCompassMemes
human
$26.50 of returns for a working lower/upper? Hmm, not bad.
gpt
It's not exactly a great alloy of aluminum to be using though, it's far more likely to crack than the typical 7075 alloy used for AR's.  It may even be more prone to cracking or deformity more than 3d printed plastic lowers.