Thanks for taking the time to look. I'm picking up my first custom build this week. (Hardly excited) Anyhow, the last thing I need to dial is is purchasing rings. I've approached the whole build with a "spend a bit more, but buy things only once" mentality. They will need to fit a NXS 5.5-22x56mm on a Defiance long action with the Defiance 20 MOA picatinny rail. The barrel is a carbon fiber wrapped Rock Creek, if that matters. I'm unsure as to the height of 30mm rings I ought to be after, I'm also unsure as to a very high quality brand of ring? Thanks in advance for any advice. Kevin Wall.