I do like the sights! No worries about heat waves, that's for sure. I happen to have a Rapine mold in .500 and with .020 cotton duck patching it fits perfect. I already had a bunch of balls made up for another somewhat oddball bore size rifle that I have so I was able to take it right out of the box and shoot it. I hit all of the gongs I have spread out throughout the property so I was impressed. I can't wait to get it on the bench and see how it's really doing, but so far it has impressed the heck out of me. I shot twenty shots with the flint that was on the lock and it still looks the same, nice and sharp. I swore that I was done buying any more contemporary rifles, as I will never get around to enjoying all of the ones I have before I die, but I saw this one and, well, j just had to have it.