Magpul Mag596-Black RVG M-LOK Adapter Rail Polymer Black 1.9" M-LOK The Magpul RVG M-LOK Adapter Rail Is a Polymer M-LOK Accessory Rail That Is Optimized For The Attachment Of The Magpul RVG To All M-LOK Compatible Hand guards And forends. Molded Of The Same High Quality Material as Other Magpul Polymer Rails, The RVG M-LOK Adapter Rail Has The Same Footprint as The RVG And Lower Profile Than a Standard Picatinny Rail To Ensure a Seamless Transition Between The Different Components. All Hardware Necessary For Attachment Directly To M-LOK slots On Compatible Aluminum Or Polymer Hand guards And forends Included. Dimensions: Black Material: Polymer