Plas62, I bought it from Whittaker's Guns in Owensboro, KY. I was looking for a model 2TL, but they didn't have one in stock. They had a good enough price on this one that I decided the quad rail could wait for another day.
twofourthree73, I love the ambi-catch. I like that I can run the mag release and bolt catch/release with my trigger finger without having to change my grip on the rifle. I ordered it from Midway USA, I think I paid around $90 for it.
I don't have any complaints about the EOTech's co-witness. It didn't bother me at all. I would still like to have a little more room between the EOTech and my BUIS, but I'll probably just deal with it until I upgrade to a free floated quad rail hand guard instead of installing a riser to clear my current hand guard.
With cheap steel cased ammo I was able to keep all of my shots on paper at 200 yds. using the EOTech or the irons from a prone position. I have some different ammo on order to see if it groups any better, but for now I'm happy with the precision. I don't expect this rifle to be a tack driver.
The Magpul MIAD grip is also a keeper. I have big hands, and this grip blows the standard pistol grip out of the water. Highly recommended.