We have a large variety of AR-15 Gas Blocks, Low Profile Gas Blocks, Rail Height Gas Blocks, Quad Rail Gas Blocks and more. All of our gas blocks are made in the United States of America and are guaranteed to work. Our AR-15 Gas Blocks are made at the highest quality and affordable price. Everything is in stock and ready to ship same or next business day! We are your experts when it comes to all things AR-15, AR-308, AR 9mm, AK-47 and Sig MPX.