I have found that my basic PSA lowers, w Delton 11.5 barrels fitted w a Holosun red dot will shoot as tight a group as a Daniel Defense with a much longer barrel out to 100 yards. (Using the same optics).
I love these rifles, they are remarkably reliable, and easy to use in tight spaces. Under $1,300 including optic, and magpul back-ups.
I will say that the .308 Daniel Defense shot as tight as a bolt gun. I was remarkably impressed by it. And it of course shot circles around my FAL and Socom. Ha.