I am new to the AR world, certainly not new to rifles and have owned gas guns in the past. The simple, modular elegance of the AR platform makes it easy to maintain and breakdown, and I am finding as a recent purchaser of a S&W MP15 optics ready carbine, it's kind of hard to just leave well enough alone with these guns. I am going to start assembling an AR10 in 7.62. I am hoping to garner responses for 5.56/223 as well as 7.62. Do the same manufacturers build equally accurate/equal quality AR10 and AR15 components, or are there differences when it comes to caliber? So here is my question. It is kind of a two-parter. I only ask that if you reply, please provide meat and potatoes answers about the technical aspects of the product only (not customer service/aftermarket support). Not interested in brand names being thrown about with no concrete support for WHY it is a good manufacturer Who are your top manufacturers for: A) build components and B) 'out of the box**', pre-assembled I see a lot of folks who don't want to build for their first (I was one) so I remain curious about 'out of the box' and once they get the bug (I am one), they become ready to build because you see how easy it is from taking down that 'out of the box' gun. ** when I refer to 'out of the box', my example would be walking into your LGS and upon seeing the (S&W, Colt, etc) you say "I'll take that one"