I just picked up a 16" BCM on Saturday and got a great deal on a Vortex Crossfire 2 1-4x 30. Now this will not be the final optic for this rifle as I am trying to decide if I want a red dot or a variable power scope. The issue I am having with the Vortex is finding the proper eye relief and still being able to use the rear BUIS. I have to move the rear objective so far back that it covers the rear BUIS. Maybe this isn't an issue seeing as the reticle is visible all the time regardless if I have the illuminated red dot on or off.
Is this a common issue with using a variable power scope on an AR?
Mike