KeyMod is a modular rail system designed for firearms, particularly rifles. It allows users to attach various accessories, such as grips, lights, and sights, to their weapons without the need for bulky Picatinny rails. The system uses a series of slots and mounting points, making it lightweight and versatile. Developed by VLTOR, KeyMod has gained popularity among firearm enthusiasts for its ease of use and customization options. The design promotes a streamlined appearance while maintaining functionality, allowing users to configure their firearms to suit their specific needs and preferences.