XLR M-LOK Picatinny Rail 4.5in 11 Slot Black Small 4.5in. XLR constructed each of these Picatinny Rails from 6061 T-6 aluminum for maximum durability that will barely add any weight to your build. This XLR 1913 Picatinny Rail is also complete with a matte black anodized finish that will resist corrosion and hold up in any type of weather for years to come. These rails include all necessary attachment hardware to get the job done. Throw on the XLR M-LOK Picatinny Accessory Rail to customize your weapon just the way you like it. Specifications for XLR M-LOK Picatinny Rail: Manufacturer: XLR Color: Black Finish: Matte Black Anodized Fabric/Material: 6061-T6 Aluminum Gun Rail: Picatinny Included Accessories: Hardware Quantity: 1 Features of XLR M-LOK Picatinny Rail 1913 Spec Rail Package Contents: XLR M-LOK Picatinny Rail XLR 1029: M-LOK Picatinny Rail 4.5in 11 Slot Black Small 4.5in