I’m converting the an H&K MR556A1 lower to have ambi controls. Would any of the Caracal uppers fit on such a MR556A1 lower?

Question

I’m converting the an H&amp;K MR556A1 lower to have ambi controls. Would any of the Caracal uppers fit on such a MR556A1 lower?

Markus · Accepted Answer

Yes, the car 816 is essentially the 3rd gen mr556. I&#039;d recommend getting the mr556 buffer and spring but that&#039;s all you should need

I’m converting the an H&K MR556A1 lower to have ambi controls. Would any of the Caracal uppers fit on such a MR556A1 lower? — 1 Answer