How are the Daniel Defense irons then? Troys are garbage now? That sucks to hear.
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Hmmm…Wonder how MarkM feels about LWRC rifles? 
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Troy’s are fine…they had a bad batch some time ago that got out with canted bases but that issue was resolved quite some time ago last I saw.
Don’t overlook the PRI sights as they make a good product too.
even at 50 yards, each click on the troy rear is a 1/4" of movement (.5 MOA), thats finer than most iron sights. The front sight elevation isnt as fine, but thats because a standard AR15 sightpost has quarter turn increments, each click about 3/4 to 1 inch of movement.
But remember these are irons, not precision scopes. You can get plenty combat accurate on irons. Im pretty OCD as well when it comes to zeroing
The front sight should be in perfect focus and centered in the rear aperture when shooting for precision.
Troy folding rear sights are wholly acceptable (to me) as a back-up system when a primary system will not permit a fixed rear. No, they are not as adjustable as other designs, but they work well enough. There were/are some with issues, but given their widespread use, the number of failures are pretty low.
I know, but it was hard to do in the near dark. The range I go to is lit about like the outdoors in the woods 30 minutes before sunset. Everything is in dark shadow.
EDIT: Basically said the same thing F2S said.