I assume if the kit came with the FA sear, it came with the FA trigger group and hammer aswell... All one would be missing is a FA BCG which one probably has, and some time on a mill. But that would not be nice and who knows how many children would be armed? Did you think about it? The children!
I have some of those, but they didn't come in a Stag kit - where'd you get it? I wouldn't mind a few spare proper hammers. Incidentally, just to set things straight for those confused by this, there is nothing even remotely illegal about possessing that part, or an FA hammer, disconnector, bolt carrier group, or selector. It's not legal to have a full auto lower, everything else is (irrelevant) fair game.
Will the FA hammer function properly with my standard bolt carrier?
Marstar was selling a bunch of M16 lower parts kits a couple months back. Perfectly legal and common. You just don't put in the parts that don't fit.