Evolution Gun Works (EGW) takes pride in its meticulous craftsmanship, utilizing State-of-the-art CNC machinery to produce high-quality barrel links right here in the USA. Each piece undergoes a comprehensive machining process that includes spotting, drilling, reaming, chamfering and engraving, ensuring precision and durability. Crafted from heat treated 4140 chromoly steel, these barrel links are engineered for strength and resilience. Following machining, they are expertly blued to enhance corrosion resistance and provide a sleek, professional finish. Trust EGW for components that exemplify superior engineering and American manufacturing excellence. 0.283 inches, measured from center to center