Need advice on ring size For 50 mm scope

[Billyvan]

I have a VX3 witn a 30 mm tube and a 50 mm objective. I’m trying to put it on a Christenson arms Mesa rifle with a rail already mounted on the receiver. I found a set of Christensen low rings and I’m curious if my scope will clear? I just wanted to make sure before I spent the money.

 

[wapitibob]

I used lows for a long time but filed down the front boss on the rail so I could move the scope back. Mediums give me better head position so I now use those.