RRA Lower, to a BCM Upper.
First off, I'm new to the forum. I have lurked the forums for quite some time. It seems that each time I google something AR related, M4c has the answer.
Now to the question.
I'm building my first AR. I've owned 3 AR's, the second of which I installed just about every Magpul part made. I've qualified with them, and shot the Governor's Twenty match during my time in the State Military, and I work a full time job as a gun salesman. Never before have I built a rifle from the ground up, but I know my way around an AR. So I wanted to ask you guys who will have more experience in the custom build area.
Yesterday I picked up a Rock River stripped lower. My plans are to build my dream battle rifle. I'm thinking of marrying my RRA Lower, to a Bravo Company Upper.
My concern is that it will have to much slop between the receivers. What says you guys?