We used to use buckhorn sights, in partical and full designs. For long range target shooting, they were super, but for game, I always felt they covered too much game & countryside. We generally made them to have the top 'tines' act as the 300yd. sight, holding the blade level in the narrow gap of the 'tines'.
: We've gone back to normal flat-topped sights with wide shallow "V"'s and bead front sights whenever gun design allows as the shallow "V" with bead is the fastest, most accurate open sight there is.
: The Jaeger sights with folding leafs takes care of elevation for long range when desired. These, and many others are available from Trackofthewolf. Here's another sight that works well for hunting, especially with a big bore(over 20 bore rifle) that will range past 100yds.
: The silver lines are silver solder that need only rubbing with cloth to brighten. The front bead is 1/8" (or larger depending on what's wanted). With an English Sporting rifle stock style which similar to a good side by side shotgun, snapping the rifle to the shoulders automatically lines the sights up - It's a wonderful system.
: This rear sight is available from Brownells & comes "In the White" with blades all the same height. The tallest one gave a perfect zero for this .69 rifle, at 300 meters. The others are zero'd at 100mtrs., 150mtrs. and 200meters.