Hey guys, I am new to this board and super excited to have found a home for my new obsession. I recently acquired an Armalite AR10A2, I decided I wanted to build it into my dream rifle, and have run into a few frustrations. First is that the top is an A2 upper with the fixed carry handle and I dislike this. I am having a terrible time finding a flattop upper that I like. I am almost to the point of selling it and getting a DPMS as a result. What I am looking for is at least a 20" match grade barrel, threaded barrel, Forward assist, something similar to here at http://www.762sass.com/product.php?p=384&cid=1&session=8f1bbca482c9023818054a6ca9d29039 Anyone have any suggestions or would going with DPMS be a good idea since the armalite parts are so difficult to find?