Scope Mount help

[.22guy]

Sorry for this noob-ish question, but will a RRA Hi-Rise Cantilever Scope Mount work for an upper with a front sight post.

I'm looking to mount my Bushnell 4200 6-24 on my AR. Right now I can only afford one scope-mount and this one seems to get good reviews and is a good price. I just want to make sure it'll work OK.

Thanks for any input you might have.

[RobT2K]

The front post won't be visible, its too close.
I'm not familiar with that mount, but my LaRue 104 has been perfect for two different Scopes. If you can find a used one they're 160-175. How much is the RRA?

[.22guy]

60 bucks, free shipping.