Start your AR-15 build with a receiver from Freedom Forge Armory. Our lower receivers are made with 7075-T6 aluminum and precision CNC machined to + - 0.0001" mil-spec dimensions. Each receiver comes marked with Safe, Semi, Auto selector markings to give it that full auto look. Whether you are a beginner or an experienced gun builder, Freedom Forge Armory has what you need to get your new gun started the right way.