So I take this to mean that you have "the proper specifications and equipment to machine the upper receiver to fit these components", correct? Meaning, not something that was backwards engineered.As for our Executive rifle, we do NOT use a DRD Tactical upper receiver. If you were to some how procure a DRD Tactical barrel nut system and a DRD Tactical QD rail system, you cannot install it on any mil spec upper receiver. It can be installed if you have the proper specifications and equipment to machine the upper receiver to fit these components. I can say that the upper receiver used is in no way meets mil spec after the modifications are done to fit the system. That is also why there will not be pics posted of these modifications.
This isn't a leading question, just a request for clarification. And no, I won't ask where or how you came by these specifications if the answer is yes.