The Samson 040201101 KeyMod 4" Rail Kit in Black Anodized delivers a lightweight, durable upgrade to any rifle platform, built from 6061-T6 Aluminum with a black hardcoat anodized finish for corrosion resistance and long-term durability. This 4-inch KeyMod rail kit provides clean attachment points and robust rigidity, enabling you to add accessories precisely where you need them while maintaining a slim profile. Designed for versatility, the rail integrates seamlessly with KeyMod-compatible accessories, allowing shooters to tailor their setup for mounting optics, grips, lights, and more without adding unnecessary bulk. Its compact 4" length makes it an ideal choice for builds requiring enhanced modularity without compromising balance or weight, and the anodized finish helps resist wear from daily field use. The Samson rail kit combines reliable engineering with streamlined aesthetics, offering a secure, repeatable interface that supports repeatable zeroing and repeatable accessory placement across varied shooting environments. Whether upgrading a precision rifle, a patrol carbine, or a hunting setup, this 4" KeyMod rail kit from Samson enhances modularity, stability, and accessibility, enabling quick customization while preserving a clean, professional rifle appearance.