My boss has a Colt AR15 HBAR with an A2 upper.  It's a commercial model with the big-hole upper.  He wants to mount a scope on it, a Zeiss with short eye-relief.  Ideally, a flat top and Larue mounts would be our first choice, however, given the big-hole upper, I am at a loss as to how to make this happen.  I would appreciate your experience and recommendations in this matter in this matter.

For info, I'm a  ceritified AR15 LE armorer and have all of the vise blocks, barrel nut wrench and torque wrench to perform barrel swaps, etc.

This place sells large hole flat top uppers.


www.danieldefense.com/