Re: stage 1 trigger quesstion for ar15 build?
Why would your target guns be single stage? That is where two stage triggers shine (Anschutz, virtually all Olympic guns, many European target guns, precision European air guns).
Military two stage trigger are very crude. Target two stage triggers are very precise making them great for all kinds of target shooting.
Apply force for the first stage can be very low, like one pound. Then the step up to release can be ounces. This is so much better than a single stage ounce trigger that only requires a brush of the finger to set it off.
But I guess it is al what you get use to and teaching old dogs new tricks is often hard or even impossible.