I finally took the plunge and bought a lower receiver; a Sionics "gutless" lower. Am undecided on trigger choices. For a GI type trigger, my choices would be
BCM, AlG ACT, or Sionics.
A trusted friend strongly suggests I look at the Geissele SSA trigger, but I thought I'd see what the hive mind had to say. Frankly, it's a bit dear, and I have some other gun stuff to cover this Winter & Spring. Not looking for a 3-gun or precision setup right now. Need not be adjustable either, other than spring swaps. What do you AR enthusiasts like?