"Don't I need to adjust my elevation?" - When developing the LEAF™ fixed iron sight, we zeroed 10.3", 14.5", and 16" barreled rifles at 50/200 m. each using 55 gr., 62 gr., & 77 gr. 5.56 military loads. We then measured the height of each of the front sights from the top of the Picatinny rail. Compiling this data, we found a spread difference of only 0.038", and took the mean to establish our fixed height. We reliably get center mass hits out to 300 m. using this measurement, and while designed for 5.56 we have also found this to be sufficient for 300 Blackout as well.