Built a 16 inch, fluted barrel shorty with tact brake. Used Tact stock which I find a little short. I have a 1 inch extension to install this weekend. Oddly, I have not had the opportunity to shoot it yet, but field checks show everything working properly. With the short barrel, I am not looking for target grade accuracy. I have a pre-ban Colt for that. By the way, the Eagle lower looks better than the Colt. I just wanted to build the shortest possible workable AR 15 rifle.
In my opinion, the computer controlled machinery used today to produce parts does that so well that a gun that does not shoot well would be odd indeed. (assuming you buy from a reputable supplier) Also, I opine that this is remarkable in light of the fact that the M-16 is a throw-away rifle, never intended to have a long life like the earlier M-14s, M-1s and 1903s. When new developments in military arms come along the gun can be trashed and replaced cheaply. This is not to say it is a bad rifle, just built with a different intention. I expect I will get some heat for this. Keep in mind, the M-16 will get very hard use and poor maintenance compared to the average AR-15 so there is a big difference. It is an extremely simple piece of work with little machining required. I think it is a work of pure genius. John McP