The Sons of Liberty Gun Works factory OEM bolt assembly is a premium component designed specifically for mil-spec AR-15 rifles, ensuring reliability and performance in demanding conditions. Crafted from Carpenter Technology No. 158 steel, this bolt assembly undergoes a meticulous manufacturing process to meet stringent military specifications. The steel is heat treated to enhance its strength and durability, providing a robust solution for high-stress environments. Additionally, the bolt is shot-peened to improve its fatigue resistance, ensuring long-lasting performance. The vibratory tumbling process further refines the surface finish, reducing friction and wear during operation. This bolt assembly is an ideal choice for those seeking a high-quality, dependable upgrade for their AR-15 platform. The bolt is manufactured from carpenter technology no 158 steel It undergoes heat treatment in accordance with military specifications, followed by shot peening and vibratory tumbling