My favorite single stage ar trigger i have used so far. - HIPERFIRE HIPERTOUCH ECLipse AR Fire-Control Group, 2.5/3.5lb Pull Weight

This is by far my favorite trigger. I have 5 Hiperfire 24c style triggers in various ARs I Own. This trigger has a very short pull and reset that they are almost non-existent. The trigger pull is right around 1.5 pounds with the lightest springs. I an vary a little depending on where you put the trigger shoe. The reset is very positive and allows me to shoot this trigger very fast and accurately. I have not had the trigger fail or start to be come gritty after firing many rounds with out cleaning. Thanks to its hard hitting hammer design I have never had a light primer strike even with hard primmer ammo like Russian ammo. It also it holds up to PCC abuse, as good as triggers designed for PCC even though it is not marketed specifically for PCC. This probably do to its shock like looking springs on the hammer which unintentionally help absorb the shock from the abrupt PCC bolt blow back. The only negative I could not about this trigger and all 24c style triggers is they can have some incompatibility with some after market 45 degree ambi-safeties. As far as install difficulty, I am able to install them in under 5 min and I am not a certified gunsmith. All you have to do to keep springs and parts from fling is push the cam and springs down in to place is put a roll pin punch in the indent on the top of the cam and push it into place while maintaining pressure on it.