AR-15 FAQ AR-15 FAQ AR-15 FAQ What are the pros and cons of billet AR receivers? Billet AR-15 upper receivers are machined from solid aluminum, offering exceptional durability and customizability. Their precision machining and unique aesthetics make them a favorite among enthusiasts, but they come with inevitable trade-offs. Pros: Unique Designs: Custom aesthetics allow for … Continue reading AR 15 Upper Receiver – Frequently Asked Questions