I want to add an AR-15 to my collection, but I think I am going to buy the parts separate and piece it together to save a little money and to have it how I want it and not have to upgrade later. I am still in the early stages of doing my research and wanted to get some opinions on what some good brands are, and good places to buy from. It will be in 5.56, with rails for optics, foregrip, and tactical light. I would like to keep this project under $1000. Thanks.