The KDG FN SCAR Rail (4.25) a meticulously engineered upgrade that delivers the perfect balance between lightweight design and ample accessory space. As pioneers in FN SCAR rail extensions Kinetic Development Group (KDG) continues its legacy of innovation with the MREX MKII 4.25 a versatile and adaptable rail system designed to elevate your shooting experience. Whether a seasoned operator or a recreational shooter the MREX MKII 4.25 is the perfect complement to your FN SCAR 16 or FN SCAR 17 especially when paired with a 13 to 14.5 barrel. Optimal Length: The MREX MKII 4.25 extends 4.25 inches beyond the SCAR upper receiver providing ample space for mounting essential accessories while maintaining a streamlined profile that enhances maneuverability. Ergonomic Design: The MREX MKII 4.25 features a slim profile and strategically placed M-LOK slots ensuring a comfortable and secure grip even with accessories attached. Superior Construction: Crafted from durable 6061 T6 aircraft-grade aluminum with a hard coat anodized finish the MREX MKII 4.25 is built to withstand the rigors of demanding use and deliver unwavering performance. Enhanced Modularity: The MLOK system offers endless customization options allowing you to tailor your FN SCAR to your exact preferences and mission requirements. Attach lights lasers grips and other accessories with ease. Seamless Integration: The MREX MKII 4.25 seamlessly integrates with your FN SCARs aesthetics creating a sleek and unified look that enhances the rifles overall appeal.