The CMMG 55BA457 Bolt Assembly for AR15 is engineered for peak performance. Crafted from high-quality materials, it guarantees exceptional durability and reliability in any condition. Designed for optimal fit and function, this bolt assembly enhances your firearm's performance, making it a crucial upgrade for both enthusiasts and professionals. Precise Manufacturing Long Term Reliability Durable Construction Trust in CMMG for dependable firearm enhancements that will serve you reliably for years.