Well populate that barrel already and finish putting it together.
Just saying what I've heard from other sources, they had a letter from the ATF that cites commercial build parties as being 'manufacturers' or something of that nature. I haven't seen or been to a build in 7+ years. Just got back into it myself to be honestIf it makes you feel better we've had 4(?) build parties so far and everyone has a good time without issues.
I haven't felt a red star trigger since VitaminK installed that one, so I don't have a good point of reference BUT the new ALG triggers are freaking awesome! and they are drop ins.