AR-15 Overstock AR Upper Assemblies offer superior quality, dependability, and performance that will satisfy the most demanding shooter. AR-15 Overstock manufactures a wide selection of AR upper assemblies in a variety of styles and lengths. Whatever you need, AR-15 Overstock has what you’re looking for. Better yet, all AR-15 Overstock uppers are custom built-to-order enabling us to provide you with the best prices you will find anywhere. The quality of our uppers are backed by our Lifetime Warranty ? if any AR upper assembly becomes defective, we will repair or replace it at no charge. Get your AR upper at AR-15 Overstock today!