Ditto what broomd stated. My daughter has one on her M70 7x57mm and I have one on my 9.3x62mm (both with firedot #4). Leupold finally got the illuminated rheostat right, as their previous generation left a lot to be desired.
+1
VX-R glass not quite VX-6 but plenty good.
Firedot Duplex A-OK.
DF