Wilson Combat TRMLOK7: The Wilson Combat M-Lok AR handguard system has been designed to be among the lightest, strongest and most versatile compact free-floating rail systems on the market. Machined on 5-axis CNC machines from high-strength 6005A-T5 aircraft aluminum with a smooth Mil-Spec hard anodized finish, the rail handguard/interface and its robust mounting system won\'t sacrifice strength, stability or accuracy over bulkier designs. The oversize and tough nitrocarburized 4130 steel barrel attachment nut reduces heat transfer and the ergonomic handguard design offers a sleek, non-abrasive platform for comfortable dynamic shooting.