Jaeger Precision reviews the RGW M-Lok rail set for the Guns Modify Scar-L MWS GBBR, detailing its installation, which includes a lower piece and M-Lok panels, but highlights significant drawbacks such as fitment and color matching issues, and critically, the incompatibility of standard M-Lok accessories on the side rails; despite improving handling comfort, the rail kit's functionality is ultimately deemed poor due to these machining and compatibility problems.