Re: Trigger for POF 308...need some knowledge
Just because the POF can ACCEPT any small pin trigger unit doesn't mean that it will function properly with it. JARD and other mfgs have issues sometimes working 100% in every 308 pattern AR. Thus, if you go that route, you should check with JARD before you drop the money on one to ensure that they have been found to work 100% in the POF rifles.
In terms of the operation of a 2-stage trigger...it has two portions that can be felt during trigger pull. Below is a description, but my advice is to find someone in your area that has a 2-stage trigger equipped AR and get behind it (if for nothing else than some dry firing). They can take some getting used to...especially if you are used to nothing by single-stage bolt action triggers.
Basically, the first stage of a 2-stage trigger has a much longer, generally heavier travel than the second stage. The first stage is normally called take-up (and some other synonyms) but should not be confused with creep or other slop in the trigger. At the end of the first stage, you'll experience a definite stop. This is the beginning of the second stage. At this point, you have "staged" the trigger and are ready to engage the second stage and fire. The trigger essentially works like a single stage trigger at this point. You should have a crisp, clean break with a light, 2lb or less pull depending on the particular trigger.