This comprehensive kit includes everything you need to repair or upgrade your rifle’s bolt assembly” including an extractor” extractor spring” gas rings” firing pin” and other essential parts. These parts are made from high-quality materials and are designed to be durable and reliable. They are also easy to install” making it easy to get your rifle back up and running in no time. Whether you are a seasoned gunsmith or just starting out” Luth-AR’s AR Bolt Components Kit is a great choice for anyone looking to maintain or improve the performance of their rifle. With this kit” you’ll have everything you need to keep your rifle running smoothly and accurately” no matter what the situation.