M-LOK Handguards for the AR15/M4 Platforms. Easy Drop-In install, no special gunsmithing involved, fit into Delta Ring and front Handguard Cap. Remove factory handguard, drop in the M-LOK handguards and use supplied screws to secure M-LOK handguard in place. Solid fit, top rail is at receiver height and extends over Delta ring to the edge of the receiver. Handguard has 7 angle surfaces of M-LOK slots. Black Anodized Aluminum Construction.