The KRISS USA Vector Picatinny 7 Slot Side Rail Kit is a convenient addition for anyone looking to upgrade their KRISS Vector with Picatinny-compatible accessories. Designed to seamlessly integrate with the provided hard points on the Vector receiver as well as the Mk1 Mk9 and Mk11 Vector handguards this kit is highly recommended for installation on the right side of the Vector receiver. It's important to note that mounting accessories on the left side can potentially disrupt the function of the charging handle so placement on the right side is advised for optimal performance.