My 141 in 8x57 has the same front sight with a conventional rear. I thought the top was not delineated enough so I painted the tope EDGE flat black and the definition improved to my eye anyway. Cheap and worth a try. I ended up with a Leupold 1.5x5 in MAK pivot mounts. My eyes just were not up to the long range (anything over 25 yards)with Irons. I wear trifocals and just can't see that well.