The Magpul M-LOK polymer rail sections are compatible with all M-LOK compatible handguards and forends. The M-LOK rail section allows the attachment of various 1913 picatinny rail mounted accessories. You can attach lights, lasers, vertical grips and other popular accessories. The ends of the rail sections are beveled to eliminate sharp corners and edges which will reduce snagging. All necessary hardware is included.Features and Specifications:Manufacturer Number: MAG590Magpul Industries M-LOK Rail SectionFive Slot RailMaximum Overall Length 2.5"Beveled EndsPolymerInstallation hardware includedBlack