ucemike

I am also an AR virgin and doing the same thing you will be (building my first)... to that end I have also been looking at the maten upper/lowers (which I saw in another post you are also considering). I found this and thought it might be useful for you. http://megaarms.com/maten/compatibility/ This fella does a walk thru of sorts as well. https://www.youtube.com/playlist?list=PLp29WXahmeC-qb0qw72Sr3lfMNg25BgUw