#html-body [data-pb-style=XKG0AM5]{justify-content:flex-start;display:flex;flex-direction:column;background-position:left top;background-size:cover;background-repeat:no-repeat;background-attachment:scroll}Manufactured in the USA of a high-impact proprietary composite polymer. This state-of-the-art polymer allows for superior strength and unmatcheddurability and is extremely lightweight. The AR1 Extreme is the strongest composite polymer lower on the market today. The key to any good project is the foundation, and on an AR-15, that is the lower receiver. Superior strength - Built with proprietary composite polymer to withstand extreme conditions. Unmatched durability - When most lowers dent or break, the AR1 Extreme bounces back to shape. Extremely lightweight - 4.3oz Accepts all standard MILSPEC uppers up to.50 Beowulf Compatible with most current AR-15 lower parts kits, grips, and stocks.