Its a normal assembler 1, gray one. I haven't even researched quality yet, nor used it. I tried the same thing in blue assembler 2 - seems its the same.
Funny thing is, science packs are not modified by any of the mods I'm using (when moused over - it doesn't give mod name in blue as if it was overwritten by any od the mods) - yet red one has quality version, green doesn't, blue and military have quality versions. That's why it seems random.
Similarly - long handed inserters or yellow belt undergrounds/splitters didn't get quality versions. Yet red belts and all of their version did get quality versions. Those are "overriten" by "ghost on water mod" though - so can't be sure of anything, BUT...
Normal ammo magazines have quality, piercing ammo didn't get quality. None of them are overwritten by any mods.
It almost looks like quality "disabled" itself during some of the researches, but worked fine with the rest. I disabled Janky Quality for few minutes when it refused to load game after upgrade from 0.1.2 to 0.1.3, but never loaded the save file or saved the game with JQ disabled, so its not a possibility.