The KMR rail section adapts the 1913 Picatinny rail standard interface to a modular locking system, perfectly accommodating the BCM proprietary KeyMod handguard attachment system. This intelligent design not only converts the KMR into a scalable modular system but also vastly increases its adaptability and utility. Though it can function as a standalone system, the KMR rail section is also easily mounted onto a modular portion of a BCM rail, taking full advantage of the modular features within the BCM Rail family. This flexible setup allows users to expand or contract the modularity based on their current needs while maintaining compatibility with host systems. KeyMod has become the mounting platform of choice among professional military, law enforcement, and SWAT personnel, as well as everyday end-users. Its innovative modularity and interconnected system allow users to seamlessly integrate BCM Rails into their gear without the hassle of odd attachment methods. The BCM Rail offers a variety of accessories that can be installed via the KeyMods or proprietary Modular KeyMods. Each BCM Rail section is constructed from hard anodized aircraft aluminum alloy, ensuring the rails retain their rigidity, even under the most extreme conditions. This reliability and ease of use make the KMR rail section an indispensable addition to any tactical setup, offering unmatched flexibility and performance for all outdoor enthusiasts.