Which mount for Bushnell G2DMR 4.5-30x on AR platform

[Justintoxicated]

I want to mount a Bushnell G2MDR scope to my LR-308, and it has a 34mm tube , but I also want a 20moa cant.
The handguard is a JP tube, which will sit lower than the rail (and I don't have any current plants to put one on the handguard either).

I like the AD mount
http://www.americandefensemanufactur...w/product/298/
but my calculations put it about .4" above the rail. That seems a bit high.

This would would put it at .045 above the rail, but there is no forward offset or 20moa cant. Not sure if this would even work.
http://www.americandefensemanufactur...w/product/322/

I do not require a QD mount, but I think I will need the forward offset? I'm not sure...

larue mount has 10moa cant
http://www.laruetactical.com/larue-t...s-mount-lt-158
Would put it at .275" above the rail. However they don't give specifics to various ring sizes so I'm thinking it might just be an estimate? Wouldn't a larger tube diameter change the centerline? Maybe not depending how they make the rings I suppose.

Goal is a 1000 yard capable rifle scope and mount.