The Diamondback Firearms DB15 semi-automatic rifle is an excellent choice for home defense, hunting and competition. It's a modern sporting rifle that is built from the ground up right here in the USA. Featuring forged 7075-T6 aluminum receivers with a DB-15 Black Gold lower receiver, this rifle is chambered in 5.56 NATO and offers fantastic performance. With a 16" 4150 chromemoly vanadium steel barrel and a magnetic particle inspected shot peened bolt carrier, this DB15 is built to last a lifetime.