As a good gunsmith you already know this stuff, or you should:
You can build a rifle exactly to your hunting specification,
but first you have to figure out your own hunting specification.
You would never build a rifle without knowing
exactly how you're going to use it.
You don't generally use a 2-stage trigger for hunting.
Most AR rifles made for maximum accuracy are competition or prairie dog guns.
Match rifles are accurate, but a rifle set up for competition may not hunt well,
don't forget you need to carry that sucker all day and get it through thick brush.
3 pound trigger is at the light end of the scale for field use on running game,
that's generally a target or varmint pull.
If you decide to hunt running game with a 3 pound trigger,
be sure to practice outstanding trigger discipline.
I generally hunt with a 5 pound trigger, or 7 pound at the high end.
Rifle accuracy (all types of rifle) is generally found in the barrel, especially free float. AR no different.
Battle carbines can be used to hunt, but those are better as a defense weapon.
Most AR have a muzzle device, which you probably don't need for hunting.
Flat top receiver gives you more opportunities to mount optic sights the way you want.
Running game at closer distances, optic power should be fairly low (1 to 4 power at most).
Running game at longer distances, optic power up to 9x is common.
Coyote at long distance, some of those shooters go up to 12 or 14 power maybe.
Remington makes some AR variants set up for the hunt. Go look at them for ideas.
Given your deep experience and skill as a gunsmith, you can probably build a better gun than you can buy.
You already have most of the tools, only a barrel wrench is needed.
If you buy an upper receiver already barreled, you don't even need the barrel wrench.
What kind of rifles have you been building?
Let us know. We're into that stuff just like you.
Pictures would be great !!!
20 years ago before the Internet, hogs were dumb.
They got killed by 223 Rem and other small bore, and even archery.
Today they are smarter, because they read the internet.
They discovered that they are tough and armor plated.
So today it generally takes a large bore magnum to take them down.
No one ever should have showed them hogs how to log on to the web.