If you're looking for a budget priced scope, I bought this 4-16 x 44 for my Mark II G - and am pretty happy with it. It has some nice features for a $54 scope and I've had no issues with it holding zero - even using quick-lock mounts.

The adjustable parallax is my favorite feature, as I shoot from different yardage depending on who I'm shooting with or what I'm shooting at.

https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1