Very nice bud! No matter how many ARs I have and what configuration somehow the 20" is always my fav.
Building Carbines after the 20", I accessorized the 20" with a scope, rail, and bipod. Didn't take me long to realized I just killed the goose that laid the golden egg. You see the beauty of the 20" is it is right there just perfect with not too much weight, small enough to be fast, and able to reach out at distance. Its about the best size for all round all purpose. I took mine back to straight up but it did give me an excuse to build a 24" to put the scope and bipod on.
Shoot it some in various conditions other than just the range and you'll see what I mean.
Tj