Anyone Running Glocks with Defender XL and BUIS?

I'm looking for a set of irons to put on a g47. I plan on using it to shoot irons for a few months then plan on adding a vortex defender xl with the included plate. Ideally i'd like a set of irons that 1/4-1/6 cowitness but I'm not sure what that height would be with the defender xl? What height buis work best with a defender xl?