Been looking into building my own AR-10 (.308) and interested if anyone's got any particular advice. Already have about 30 long guns and want something that I can use as BOTH a predator and hunting rifle. I've thought about other calibers, but with the availability of optics set up for .308 and the WIDE range of bullets available, not to mention the cheap military ball ammo available, I thought that this would be a rifle that could not only serve it's purpose for predators, but for deer-sized game as well as just all around fun at the range. And although some may think so, to get the best accuracy, I don't think it's just as simple as buying an upper and lower and misc. parts and putting them together. And with the prices of these rifles on the market, you're bound to be able to build one better (and possibly cheaper) than you can buy already put together. Especially if you want to do it RIGHT!