Oh for a good semi-buckhorn rear sight to replace all the peep sights these guns have. I sight in with the iron sights [A2 front, MBUS rear] and adjust the red dot to sit on top edge of the front sight, and then fold down the rear sight. Peeps are way too slow for any practical shooting. But I'm having a terrible time getting the red dot adjusted. I need to take my lead sled to the range on a still day. I'm just not as steady as I used to be shooting offhand.