I am putting a peep on my interchangeable barrel build I am doing and could some of you give answers or choice of one. Does one know how far up elevation travel in inches do it move for the Lyman 57sml have and does eye part comes completely off with the quick release button . The other choice I have is the Lyman #2 tang sight , that it does state that it has .800 elevation travel. No windage travel in this one though. They will fold down and look a lot nicer on a English sporting style gun in my opinion. How far in range will get with these? The different barrels will most likely have different front sights . Thanks Wildcat2 .