The XS Sights Standard Dot Revolver Front Sight for Smith & Wesson J Frame Green Pre-Drilled combines practical, high-visibility aiming with easy, user-friendly installation for 38 SPL / 357 J-Frames that feature a pinned front sight and fixed rear sight, making it a reliable upgrade for popular models like the 640 and 340 PD. This front sight delivers a photoluminescent green dot for quick daytime and a bright Tritium center that glows in low light, helping you acquire a sight picture faster in varied conditions. The design includes a pre-drilled pinhole for straightforward DIY installation, allowing you to enhance your carry and personal defense setup without specialized tools or a gunsmith. Crafted by XS Sights, this front sight aligns with the natural ergonomics of Smith & Wessons compact revolvers, offering a durable finish and consistent post alignment to improve target acquisition, accuracy, and confidence at the range or in dynamic, real-world scenarios. Whether youre upgrading an old sight or preparing a reliable setup for night or low-light shooting, the Standard Dot Revolver Front Sight from XS Sights provides a clear, reliable aiming reference that integrates seamlessly with J-frame performance.