Ebay usually has some M8s and VIIIs. If buying new, I'd get the Leupold VIII 1.5x5. I used one for 20 yrs, on some very hard kickers ( 416s, 375s, 458s to name a few) I also used a Weaver Classic 1x3 on a CZ 550 416 Rigby. Held up fine.