Re: 1st time sighting in Troy BUIS
I have no problem with the Micro BUIS on a couple different rifles. When the last set I got arrived, I removed them from the packaging, mounted them and zeroed them the same day. The first thing I had to do is move the front sight to change POI roughly 6" up at 35yds.
The best advice I can give you is to find the center of the adjustment range on the rear sight and set it there (your primary means of elevation adjustment should come from the FRONT SIGHT...not the rear). Then, with a small punch (or a 5.56 bullet tip if you don't have a punch...you need not waste time or money with the sight adjustment tools), adjust the front sight post until you can achieve your desired zero. The adjustments are in 1/2MOA increments (for both front and rear sights). To move your bullet impact UP...you need to move the front sight post DOWN which should require right-handed/clockwise adjustments.