Well I drank the Kool Aid and bought an upper from Grendel Hunter in 22 Arc with an 18 inch barrel. I am really not an AR shooter, although I shoot them with my kids for fun on occasions. I have to say I'm pretty pumped about it., went to the range today and with Hornady 88 gr ELDM I was getting 0.75-0.80 groups at 100 yards. It's a nice rifle, hoping to shoot coyotes the off season. Now I need to learn how to shoot it for precision, as it's so different even with a TT trigger on it 
