I bought mine from Midway, cost a bit more, but I was ordering other stuff, so the savings in shipping washed the difference in cost. Don't have a range report yet, but using the Williams process for determining sight height relationship, the .584" high standard font sight will be higher than needed, idea height according to them would be .550" high, so the .584" tall 17AUG sight that came on my BC won't allow as long range as possible with a lower sight. I installed the .404" tall 17AHB sight, which appears when bore sight to be maybe a bit too low, but maybe not with the big bullets and low pressure loads.
One issue you'll need to deal with is the loctite in the mount holes on the BC, the holes are much deeper than they appear, but the screws that come with the sight will bottom out and seem too long, dig the loctite out of the mount holes and you'll be good to go, it will mount up just fine. One reviewer of the sight at Midway, stated that he had to take his to a gunsmith to get it mounted cuz the screws were too long, not so with mine and a couple others here, that smith just removed the loctite and probably charged him good for it!
http://www.graybeardoutdoors.com/phpbb2/viewtopic.php?t=57989http://www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=572292