The Stern Defense 00640SWBARREL161INCHD1 is a precision 16.10" barrel engineered for 40 S&W applications, offering a Black Melonite finish on durable 4150 chrome moly steel for enhanced wear resistance and longevity in demanding field or range use. This barrel features a 1:16" twist that promotes stable bullet stabilization for a wide range of projectiles, making it a versatile choice for duty, competition, or recreational shooting. With a true 16.10" length, it delivers improved muzzle velocity and leverages the balance and ergonomics sought by accurized builds and tactical setups, while maintaining manageable overall firearm dimensions. The finish not only provides a low-glare appearance but also resists corrosion and field exposure, helping maintain consistent performance over time. Ideal for upgrading a compatible handgun platform to achieve improved chamber alignment, smoother cycling, and enhanced accuracy, this barrel supports reliable chambering and repeatable shots through repeated sessions at the range or in field scenarios. Stern Defense combines robust construction with practical design, delivering a reliable component that optimizes ballistic consistency and shootability.