At Tegra Arms, we are dedicated to creating and providing the highest quality products to our clients. Our carbon fiber composite AR-15 lower is a perfect example of our dedication to creating the finest products. Our lower is the first of its kind. With carbon fiber reinforcement it is stronger, more durable, and lighter than other lowers currently on the market. We are proud to sell this carbon fiber AR-15 reinforced lower and are confident in its quality and performance. We have a LIFE TIME no questions asked warranty.