Occasionally modern times require modern equipment, hence the introduction of the RDB M-LOK Forend. This aluminum extrusion is made to the highest standards and allows for quick and easy installation of any M-LOK patterned accessories from pic rails to direct mount foregrips to weapon-mounted lights. It's a rigid, customizable, no-hassle replacement for your polymer OEM handguard measuring in at 11.5 This will fit all RDB models. Installation Instructions