My interest has been peaked in the 6.8spc cartridge and wanted to know if there are any factory rifles, not uppersor conversions, but complete factory ARs chambered in 6.8spc that are affordable (1000ish and under) who are also reliable and solidly built? What are the options? Ruger makes one, it's a 1500ish and I saw Rock River has one for about 1000ish. I don't know anything about these 2 in terms of reliability and performance or what else is out there?? I'm sure theres a nice afforable, solidly buil AR15 in 6.8spc - please educate me!! Thanks!