Yes they are sharp. So much so that while practicing quick mag reloads it tears my fingers and palm up when jacking the slide. This old office boy doesn't have calloused hands some might. I've been shown the correct way to do it, Palm and fingers on opposite sides, still doesn't help. I read on the forum about knocking of the edges with a stone and I've tried that after putting down the suggested tape in the bottom of the grooves but it's not doing much good I just tear up the tape and mark the groove bottom. Really can't put anything much thicker that tape to help not marking groove. The depth is shallow enough now that when adding to the groove the angle of stone to sharp edges doesn't really take the "corner" down. The grinding will be too close the face of the raised serrations. Understand? I've not given up yet but thought maybe others have found a better way short of taking it to a gun smith or living with it. I've tried square stones, Round Dremel type stone (which is the best is the stone dia. doesn't touch the bottom of the channel), don't want to think of sandpaper. ?????