The large adjustment knob had the machined screw sticking out so far that I could not use a coin to snug it. The smaller knob (on the right) had the screw length correct, such that I could use a coin to snug. This right knob isn't meant to turn once adjusted, as it has a set screw to keep it in place, so there is an easy return to zero when removed and reinstalled.

So, I basically had to grind off about 8 threads of length on the screw end for the large knob. So, now I can use a coin to tighten the large knob (left), and the screw isn't sticking beyond that slot from within, like it was before. I also ended up repositioning the screw position within the sight, and ya, had it apart several times tuning all of this.

I did purchase the tall front sight with this, so I have enough height on the front post. Also purchased the largest ghost ring, and it's the cat's meow for quick target aquisition.

So, I had to ding the sight one star, 4 vs 5 for me, as I prob spent a couple of hours tuning it. It is one heck of a solid machined set of sights.

Pretty happy.

I will start by saying I’ve not yet been able to zero yet other than bore sighting but this is a great addition to my Ruger guide gun for hunting where I live. Too wooded for a scope and used as much for defense as hunting. My only wish is that the main body came in bead blasted stainless to better match the rifle but it’s a tool not a show piece so I’m happy

I have used this site for a 416 Alaskan and 7mm Mauser International. In both instances, precision was acceptable, but vastly improved with the addition of a patridge blade foresight. The brass post enhances precision compared to any bead (and I have tried white, fiberoptic, and brass). It is a disadvantage to try to keep up with the peep if removed for a QD optic placement, but return to zero is excellent so switching back and forth is no problem. If you enjoy iron sights, this will make your day.

My 53-year-old Ruger M-77 flat bolt handle rifle presented a clearance problem with my first choice, the N-100 model. NECG exchanged it with a modified N-100G sight which I am very well pleased with. Thank you Mark for guiding me through the process.